WO1999034032A1 - Corrosion protected treatment device - Google Patents

Corrosion protected treatment device Download PDF

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Publication number
WO1999034032A1
WO1999034032A1 PCT/SE1998/002240 SE9802240W WO9934032A1 WO 1999034032 A1 WO1999034032 A1 WO 1999034032A1 SE 9802240 W SE9802240 W SE 9802240W WO 9934032 A1 WO9934032 A1 WO 9934032A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
tubular member
cover member
outlet
degasifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/SE1998/002240
Other languages
French (fr)
Swedish (sv)
Inventor
Leif Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Avonni AB
Original Assignee
Avonni AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to HU0100449A priority Critical patent/HU223556B1/en
Priority to AU17942/99A priority patent/AU1794299A/en
Priority to PL98340690A priority patent/PL188436B1/en
Priority to JP2000526680A priority patent/JP2002500274A/en
Priority to EP98962784A priority patent/EP1047810B1/en
Priority to DE69817403T priority patent/DE69817403T2/en
Priority to DK98962784T priority patent/DK1047810T3/en
Priority to US09/554,086 priority patent/US6387226B1/en
Application filed by Avonni AB filed Critical Avonni AB
Priority to AT98962784T priority patent/ATE247725T1/en
Priority to CA002313237A priority patent/CA2313237C/en
Publication of WO1999034032A1 publication Critical patent/WO1999034032A1/en
Priority to NO20002743A priority patent/NO321127B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/16—Electrodes characterised by the combination of the structure and the material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2201/00—Type of materials to be protected by cathodic protection

Definitions

  • the present invention relates to a device for treating water which circulates in a closed conduit system, for instance in a central heating system.
  • the arrangement can -be controlled by regulating the flow of liquid passing through the parallel conduits and electrolysis apparatus, voltage selection across anode and cathode, selection of anode material and the optional addition of electrically conductive liquid, e.g. hydrazine.
  • electrically conductive liquid e.g. hydrazine.
  • These corrosion inhibitors are, however, both sophisticated and expensive and are therefore inappropriate for use in central heating systems.
  • corrosion inhibitors in the form of separate vessels that can be arranged in a parallel conduit or directly in the closed circuit, such that part of the liquid circulating in the circuit or all of said liquid will pass through said vessels, and which includes a sacrificial anode that functions in the absence of an applied voltage.
  • Such inhibiting devices are commercially available under designations PROMAG® and
  • the present invention addresses the problem of providing a water treatment device that prevents corrosion both by de- aerating or degassing the circulating liquid and by processing said liquid electrolytically, and that is also essentially free from the drawbacks associated with known cathodic corrosion inhibitors mentioned above.
  • a device of the kind defined in the introduction which is comprised of a degassifier and corrosion inhibitor combination
  • the degassifier includes a tubular member which is horizontal in its use position and which is intended for connection in series with a conduit that forms part of the conduit system and which is surrounded between its upstream and downstream ends by an openable housing that includes an upper gas outlet, said tubular member communicating with the surrounding housing space via at least one opening provided therein, and wherein the corrosion inhibitor includes a sacrificial anode and is located in the housing space outside said tubular member, said housing also being provided with an openable bottom outlet.
  • the arrangement proposed i accordance with the invention provides, with the aid of simple means, an advantageous and effective water treatment device with which erosion of the sacrificial anode is very slight and with which said anode will dissolve essentially only at the rate governed by the occurring need of corrosion inhibition.
  • This combination of degasifier and corrosion inhibitor with sacrificial anode in one single component in accordance with the invention also affords important p ace-savmg a simplifiea installation advantages .
  • Fig. 1 is a vertical axial section view of a first embodiment of an inventive water treatment device.
  • Fig. 2 is a cross-sectional view taken on the line II-II in Fig. 1.
  • Figs. 3-6 are views similar to the view of Fig. 1 and illustrate four further embodiments of the inventive device.
  • the water treatment device illustrated in Figs. 1 and 2 includes a tubular member 10 having inlet and outlet ends 11, 12 and intended for connection in series with a horizontal conduit represented by the arrows 13 and 14 and included in a closed conduit system, e.g. a central heating system.
  • the tubular member 10 is provided between its ends 11, 12 with an interruption or an aperture 15 and is surrounded by a housing 17 that includes an upper gas outlet l ⁇ .
  • the gas outlet l ⁇ is equipped with a valve 18 which can be opened either manually or automatically to remove gas, e.g. air, that has collected in the upper part of the housing I" 7 .
  • the nitnerto descrioed water treatment evice forms a gas separator for liquid circulating n the conduit system.
  • the arrangement may include wing-like members 19 that function to promote a desired flow pattern through the gas separator.
  • Degassing or de-aerating of circulating liquid in closed systems is beneficial, since the presence of gas, e.g. air, in systems that operate with water-carried heat can lower efficiency of the system and cause cavitations m circulation pumps. Oxygen concentrations in the liquid can also give rise to corrosion problems, which are reduced by degassing cr de- aerating the liquid. Additional protection against corrosion is achieved with the device illustrated i Figs. 1 and 2, by placing a sacrificial anode 20 in the housing space externally of the tubular member 10, where the rate of liquid flow is greatly reduced and the erosion of the sacrificial anode caused by the liquid is correspondingly slight, said anode being comprised of magnesium, for instance.
  • gas e.g. air
  • the anode 20 is housed partially in a pipe-like connection piece 21 projecting cut from the housing 17.
  • the cuter end of the connection piece 21 is closed by an cuter, removable lid cr cover member 22 which supports the anode 20.
  • Figs. 1 and 2 show the anode 20 carried by a bracket 23 which is insulated electrically from the cover member, and a bolt 24 that passes through the cover member 22, said insulation being shown at 25.
  • the anode 20 is connected conductively to the cover member 22 and to the conduit system in general by means of a cable shown at 26.
  • a check to establish whether or not the anode has been consumed can be easily carried out, by breaking the connection (removing one end of the cable 26) and measuring the voltage between the bolt 24 and the cover member 22 insulated from said bolt, said bolt being connected conductively to the anode.
  • sludge collects beneath the anode and drains-off through a bottom drain 28, which is preferably controlled by means of a valve 27.
  • the bottom drain 28 is conveniently arranged in the cover member 22.
  • the bottom drain 28 can be replaced by the removable cover member 22.
  • the cover member 22 is conveniently fitted sealingly to a flange 30 on the outer end of the part 21, for instance by means of bolts 29, in the manner shown.
  • the water treatment device according to the invention is connected to a particle separator 31.
  • This separator may include a filter or strainer
  • the particle separator 31 of the embodiments illustrated in respective Figs. 3-6 includes a housing 17A which forms an extension of the housing 17 and which includes its own bottom drain cr cutlet
  • the housing components 17, 17A are separated from each other by a common partition wall 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Physical Water Treatments (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Centrifugal Separators (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Cyclones (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Pipeline Systems (AREA)

Abstract

A device for treating water that circulates in a closed conduit system, said device comprising a combination of a degasifier, on the one hand, and a corrosion inhibitor, on the other hand. The degasifier includes a tubular member (10) which is horizontal in its use position and which is intended to be connected in series with a conduit (13, 14) forming part of the conduit system. The tubular member is surrounded between its upstream and downstream ends (11, 12) by a housing (17) which includes an openable upper gas outlet (16). The tubular member communicates with the surrounding housing space through the medium of at least one aperture (15) provided therein. The corrosion inhibitor includes a sacrificial anode (20) which is positioned in the housing space outside the tubular member (10). The housing (17) also includes an openable bottom drain or outlet (28).

Description

CORROSION PROTECTED WATER TREATMENT DEVICE
The present invention relates to a device for treating water which circulates in a closed conduit system, for instance in a central heating system.
It is known to degas or de-aerate liquid that circulates in a closed circuit, in order to inhibit corrosion and cavitation in pumps. An arrangement intended for this purpose is described, for instance, in EP-A-0 273 508. WO 97/10890 teaches a similar de-aerator arrangement connected in series and combined with an arrangement for separating solid particles from the circulating liquid. Cathodic devices are other forms of corrosion inhibiting means. For instance, US-A 4,376,753 and WO 96/22407 teach the arrangement of electrolysis apparatus having consumable anodes connected in parallel conduits branching from the circulation system and particularly designed for this purpose. The arrangement can -be controlled by regulating the flow of liquid passing through the parallel conduits and electrolysis apparatus, voltage selection across anode and cathode, selection of anode material and the optional addition of electrically conductive liquid, e.g. hydrazine. These corrosion inhibitors are, however, both sophisticated and expensive and are therefore inappropriate for use in central heating systems. There have also been suggested in the art corrosion inhibitors in the form of separate vessels that can be arranged in a parallel conduit or directly in the closed circuit, such that part of the liquid circulating in the circuit or all of said liquid will pass through said vessels, and which includes a sacrificial anode that functions in the absence of an applied voltage. Such inhibiting devices are commercially available under designations PROMAG® and
ELYSATOR® respectively. The arrangement of a corrosion inhibiting device in a parallel conduit incurs extra installation costs and the requirement of more space, wnereas the installation of a corrosion inhibiting device directly in a conduit in the closed circuit normally results in unacceptable erosion cf the sacrificial anode, therewith greatly limiting the useful life span cf said anoαε.
The present invention addresses the problem of providing a water treatment device that prevents corrosion both by de- aerating or degassing the circulating liquid and by processing said liquid electrolytically, and that is also essentially free from the drawbacks associated with known cathodic corrosion inhibitors mentioned above.
With the intention of solving said problem, there is proposed in accordance with the invention a device of the kind defined in the introduction which is comprised of a degassifier and corrosion inhibitor combination, wherein the degassifier includes a tubular member which is horizontal in its use position and which is intended for connection in series with a conduit that forms part of the conduit system and which is surrounded between its upstream and downstream ends by an openable housing that includes an upper gas outlet, said tubular member communicating with the surrounding housing space via at least one opening provided therein, and wherein the corrosion inhibitor includes a sacrificial anode and is located in the housing space outside said tubular member, said housing also being provided with an openable bottom outlet.
The arrangement proposed i accordance with the invention provides, with the aid of simple means, an advantageous and effective water treatment device with which erosion of the sacrificial anode is very slight and with which said anode will dissolve essentially only at the rate governed by the occurring need of corrosion inhibition. This combination of degasifier and corrosion inhibitor with sacrificial anode in one single component in accordance with the invention also affords important p ace-savmg a simplifiea installation advantages .
Further advantageous features cf the invention are set forth in the depending Claims.
So that the invention will be more readily understood and further features thereof made apparent, the invention will now be described in more detail with reference to exemplifying embodiments thereof and also with reference to the accompanying drawings.
Fig. 1 is a vertical axial section view of a first embodiment of an inventive water treatment device.
Fig. 2 is a cross-sectional view taken on the line II-II in Fig. 1.
Figs. 3-6 are views similar to the view of Fig. 1 and illustrate four further embodiments of the inventive device.
Coinciding, or generally coinciding, features and components shown in the drawings have been identified with the same reference signs.
The water treatment device illustrated in Figs. 1 and 2 includes a tubular member 10 having inlet and outlet ends 11, 12 and intended for connection in series with a horizontal conduit represented by the arrows 13 and 14 and included in a closed conduit system, e.g. a central heating system. The tubular member 10 is provided between its ends 11, 12 with an interruption or an aperture 15 and is surrounded by a housing 17 that includes an upper gas outlet lβ. The gas outlet lδ is equipped with a valve 18 which can be opened either manually or automatically to remove gas, e.g. air, that has collected in the upper part of the housing I"7. The nitnerto descrioed water treatment evice forms a gas separator for liquid circulating n the conduit system. As liquid passes through the gas separator, gas bubbles that accompany the liquid are able tc depart from the tubular member 10 through the aperture 15 and thereafter collect in the upper part of the gas separator. Some of the liquid entering through the end 11 of the tubular member 10 is deflected out from the tubular member into the surrounding housing 17. This deflected liquid volume passes forwardly in the housing 17 at a reduced speed and thereafter downwardly around the downstream end 12 of said tubular member 10 and rearwardly beneath said tubular member and finally upwardly around the upstream end 11 of said tubular member, where said deflected liquid volume is entrained by the main flow passing directly through the tubular member. As illustrated, the arrangement may include wing-like members 19 that function to promote a desired flow pattern through the gas separator.
Degassing or de-aerating of circulating liquid in closed systems is beneficial, since the presence of gas, e.g. air, in systems that operate with water-carried heat can lower efficiency of the system and cause cavitations m circulation pumps. Oxygen concentrations in the liquid can also give rise to corrosion problems, which are reduced by degassing cr de- aerating the liquid. Additional protection against corrosion is achieved with the device illustrated i Figs. 1 and 2, by placing a sacrificial anode 20 in the housing space externally of the tubular member 10, where the rate of liquid flow is greatly reduced and the erosion of the sacrificial anode caused by the liquid is correspondingly slight, said anode being comprised of magnesium, for instance.
In the illustrated case, the anode 20 is housed partially in a pipe-like connection piece 21 projecting cut from the housing 17. The cuter end of the connection piece 21 is closed by an cuter, removable lid cr cover member 22 which supports the anode 20. Figs. 1 and 2 show the anode 20 carried by a bracket 23 which is insulated electrically from the cover member, and a bolt 24 that passes through the cover member 22, said insulation being shown at 25. In operation, the anode 20 is connected conductively to the cover member 22 and to the conduit system in general by means of a cable shown at 26. A check to establish whether or not the anode has been consumed can be easily carried out, by breaking the connection (removing one end of the cable 26) and measuring the voltage between the bolt 24 and the cover member 22 insulated from said bolt, said bolt being connected conductively to the anode.
As the sacrificial anode 20 is consumed, sludge collects beneath the anode and drains-off through a bottom drain 28, which is preferably controlled by means of a valve 27. in the case of the illustrated water treatment device where the part 21 faces downwards, the bottom drain 28 is conveniently arranged in the cover member 22. Alternatively, the bottom drain 28 can be replaced by the removable cover member 22. The cover member 22 is conveniently fitted sealingly to a flange 30 on the outer end of the part 21, for instance by means of bolts 29, in the manner shown.
In the embodiment shown in Fig. 3, the water treatment device according to the invention is connected to a particle separator 31. This separator may include a filter or strainer
32, for instance of the kind illustrated and described in WO 97/10890, or may lack such a filter and therewith function to collect relatively course particles. The particle separator 31 of the embodiments illustrated in respective Figs. 3-6 includes a housing 17A which forms an extension of the housing 17 and which includes its own bottom drain cr cutlet
33. The housing components 17, 17A are separated from each other by a common partition wall 34. The particle separator
31 is conveniently disposed at the upstream end of the degasifier, as shown in Figs. 3 and 4, although it may alternatively be disposed at the downstream end of said degasifier, in accordance with Figs. 5 and 6. With regard to the remainder cf the reference signs included in Figs. 3-6, these signs have the same significance as that disclosed in the description of Figs. 1 and 2.
It will be realised that the invention is not restricted to the aforedescribed and illustrated exemplifying embodiments thereof and that the invention can be implemented in any desired manner within the scope of the inventive concept as defined in the accompanying Claims.

Claims

1. A device for treating water that circulates in a closed conduit system, characterised by a degasifier and corrosion inhibitor combination, wherein the degasifier includes a tubular member (10) which extends horizontally in its use position and which is intended to be connected in series with a conduit (13, 14) that forms part of the conduit system and which is surrounded between its upstream and downstream ends (11, 12) by a housing (17) that includes an openable upper gas outlet (16), wherein said tubular member communicates with the surrounding housing interior via at least one aperture (15) provided therein, and wherein the corrosion inhibitor includes a sacrificial anode (20) located in said housing space externally of said tubular member (10), and wherein the housing (17) also includes an openable bottom drain or outlet (28) .
2. A device according to Claim 1, characterised in that the anode (20) is accommodated partially in a pipe-like member
(21) which projects out from the housing (17) and which has an outer cover member (22) .
3. A device according to Claim 2, characterised in that the pipe-like member (21) extends downwardly from the housing
(17) in general; and in that the bottom drain or outlet (28) is provided in said cover member (22) .
4. A device according to Claim 2 or 3, characterised in that the sacrificial anode (20) is carried by the cover member (22) .
5. A device according to Claim 4, characterised in that the sacrificial anode (20) is supported electrically insulated from said cover member (22) . 3
6. A device according to any one of Claims 1-5, characterised in that the bottom outlet (28) or the cover member (22) includes a sludge outlet valve (27).
7. A device according to any one of Claims 1-6, characterised in that either the upstream or downstream end (11, 12) of the tubular member is connected to a particle separator (31), and in that the degasifier and particle separator are housed in a common housing (17, 17A) .
8. A device according to Claim 7, characterised in that the particle separator (31) is connected to the upstream end (11) of the tubular member (10) .
PCT/SE1998/002240 1997-12-15 1998-12-08 Corrosion protected treatment device Ceased WO1999034032A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DK98962784T DK1047810T3 (en) 1997-12-15 1998-12-08 Corrosion protected treatment device
PL98340690A PL188436B1 (en) 1997-12-15 1998-12-08 Apparatus protecting a closed-loop liquid circulation system against corrosion
JP2000526680A JP2002500274A (en) 1997-12-15 1998-12-08 Corrosion prevention water treatment equipment
EP98962784A EP1047810B1 (en) 1997-12-15 1998-12-08 Corrosion protected treatment device
DE69817403T DE69817403T2 (en) 1997-12-15 1998-12-08 RUST-PROTECTED TREATMENT DEVICE
HU0100449A HU223556B1 (en) 1997-12-15 1998-12-08 Corrosion protected treatment device
CA002313237A CA2313237C (en) 1997-12-15 1998-12-08 Corrosion protected water treatment device
US09/554,086 US6387226B1 (en) 1997-12-15 1998-12-08 Corrosion protected treatment device
AT98962784T ATE247725T1 (en) 1997-12-15 1998-12-08 RUST-PROOF TREATMENT DEVICE
AU17942/99A AU1794299A (en) 1997-12-15 1998-12-08 Corrosion protected treatment device
NO20002743A NO321127B1 (en) 1997-12-15 2000-05-29 Apparatus for treating circulating water in a closed circulation system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9704664-3 1997-12-15
SE9704664A SE511110C2 (en) 1997-12-15 1997-12-15 Corrosion protection for water treatment device in a closed pipe system

Publications (1)

Publication Number Publication Date
WO1999034032A1 true WO1999034032A1 (en) 1999-07-08

Family

ID=20409387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/002240 Ceased WO1999034032A1 (en) 1997-12-15 1998-12-08 Corrosion protected treatment device

Country Status (17)

Country Link
US (1) US6387226B1 (en)
EP (1) EP1047810B1 (en)
JP (1) JP2002500274A (en)
CN (1) CN1204295C (en)
AT (1) ATE247725T1 (en)
AU (1) AU1794299A (en)
CA (1) CA2313237C (en)
CZ (1) CZ295253B6 (en)
DE (1) DE69817403T2 (en)
DK (1) DK1047810T3 (en)
ES (1) ES2205590T3 (en)
HU (1) HU223556B1 (en)
NO (1) NO321127B1 (en)
PL (1) PL188436B1 (en)
RU (1) RU2215063C2 (en)
SE (1) SE511110C2 (en)
WO (1) WO1999034032A1 (en)

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CA2313237C (en) 2007-02-06
CA2313237A1 (en) 1999-07-08
DE69817403D1 (en) 2003-09-25
HU223556B1 (en) 2004-09-28
HUP0100449A2 (en) 2001-06-28
EP1047810B1 (en) 2003-08-20
SE9704664L (en) 1999-06-16
CZ295253B6 (en) 2005-06-15
ATE247725T1 (en) 2003-09-15
NO20002743L (en) 2000-05-29
AU1794299A (en) 1999-07-19
DE69817403T2 (en) 2004-07-01
DK1047810T3 (en) 2003-11-24
EP1047810A1 (en) 2000-11-02
CN1282385A (en) 2001-01-31
NO321127B1 (en) 2006-03-20
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PL340690A1 (en) 2001-02-26
CZ20002186A3 (en) 2000-12-13
JP2002500274A (en) 2002-01-08
US6387226B1 (en) 2002-05-14
ES2205590T3 (en) 2004-05-01
RU2215063C2 (en) 2003-10-27
CN1204295C (en) 2005-06-01
SE511110C2 (en) 1999-08-09
SE9704664D0 (en) 1997-12-15
HUP0100449A3 (en) 2001-07-30

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