DD160195A1 - Mittel zur beweglichkeitsregelung eines flutungsmittels und anwendung desselben bei der sekundaeren und tertiaeren oelgewinnung - Google Patents

Mittel zur beweglichkeitsregelung eines flutungsmittels und anwendung desselben bei der sekundaeren und tertiaeren oelgewinnung Download PDF

Info

Publication number: DD160195A1
Authority: DD; German Democratic Republic
Prior art keywords: monomer; group; polymer; persulfate; parts
Prior art date: 1980-06-20

Application number

DD81229491A

Other languages

German (de)

English (en)

Inventor

Perry A Argabright

John St Rhudy

Brian L Phillips

Original Assignee

Marathon Oil Co

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.)

1980-06-20

Filing date

1981-04-24

Publication date

1983-05-11

1981-04-24 Application filed by Marathon Oil Co filed Critical Marathon Oil Co

1983-05-11 Publication of DD160195A1 publication Critical patent/DD160195A1/de

Links

239000003921 oil Substances 0.000 title 1
229920000642 polymer Polymers 0.000 claims abstract description 46
239000000178 monomer Substances 0.000 claims abstract description 36
238000000034 method Methods 0.000 claims abstract description 29
238000006116 polymerization reaction Methods 0.000 claims abstract description 29
239000003054 catalyst Substances 0.000 claims abstract description 27
JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 17
230000008569 process Effects 0.000 claims abstract description 17
-1 acrylyl Chemical group 0.000 claims abstract description 14
125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 11
229920002554 vinyl polymer Polymers 0.000 claims abstract description 10
NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 8
150000003839 salts Chemical class 0.000 claims abstract description 7
238000011084 recovery Methods 0.000 claims abstract description 6
125000005504 styryl group Chemical group 0.000 claims abstract description 6
BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 3
229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 3
235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 3
239000003208 petroleum Substances 0.000 claims abstract 2
239000000243 solution Substances 0.000 claims description 31
230000015572 biosynthetic process Effects 0.000 claims description 15
MQLVWQSVRZVNIP-UHFFFAOYSA-L ferrous ammonium sulfate hexahydrate Chemical compound [NH4+].[NH4+].O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O MQLVWQSVRZVNIP-UHFFFAOYSA-L 0.000 claims description 14
229930195733 hydrocarbon Natural products 0.000 claims description 9
150000002430 hydrocarbons Chemical class 0.000 claims description 9
239000007864 aqueous solution Substances 0.000 claims description 8
239000003795 chemical substances by application Substances 0.000 claims description 8
HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical group NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 7
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
239000001301 oxygen Substances 0.000 claims description 7
229910052760 oxygen Inorganic materials 0.000 claims description 7
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
125000004185 ester group Chemical group 0.000 claims description 6
150000001408 amides Chemical class 0.000 claims description 5
150000001875 compounds Chemical class 0.000 claims description 5
ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 4
238000000605 extraction Methods 0.000 claims description 4
239000001257 hydrogen Substances 0.000 claims description 4
229910052739 hydrogen Inorganic materials 0.000 claims description 4
125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
229910052708 sodium Inorganic materials 0.000 claims description 4
239000011734 sodium Substances 0.000 claims description 4
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
230000000379 polymerizing effect Effects 0.000 claims description 3
SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 2
GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 claims description 2
125000000217 alkyl group Chemical group 0.000 claims description 2
125000003277 amino group Chemical group 0.000 claims description 2
150000002431 hydrogen Chemical class 0.000 claims description 2
229910052742 iron Inorganic materials 0.000 claims description 2
FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 2
MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 claims description 2
238000007865 diluting Methods 0.000 claims 2
239000000203 mixture Substances 0.000 claims 2
239000010779 crude oil Substances 0.000 claims 1
USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims 1
230000037230 mobility Effects 0.000 abstract description 25
230000000977 initiatory effect Effects 0.000 abstract description 2
239000001166 ammonium sulphate Substances 0.000 abstract 1
229910000358 iron sulfate Inorganic materials 0.000 abstract 1
BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract 1
230000035699 permeability Effects 0.000 description 22
230000009467 reduction Effects 0.000 description 13
238000005755 formation reaction Methods 0.000 description 9
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
229910001385 heavy metal Inorganic materials 0.000 description 7
229910052700 potassium Inorganic materials 0.000 description 7
229920002401 polyacrylamide Polymers 0.000 description 5
HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
230000001276 controlling effect Effects 0.000 description 4
KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
239000012530 fluid Substances 0.000 description 3
238000012216 screening Methods 0.000 description 3
229910019931 (NH4)2Fe(SO4)2 Inorganic materials 0.000 description 2
QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
239000004215 Carbon black (E152) Substances 0.000 description 2
CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
241000607479 Yersinia pestis Species 0.000 description 2
239000002253 acid Substances 0.000 description 2
VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 2
125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
239000003638 chemical reducing agent Substances 0.000 description 2
230000000052 comparative effect Effects 0.000 description 2
238000006073 displacement reaction Methods 0.000 description 2
239000000839 emulsion Substances 0.000 description 2
230000007062 hydrolysis Effects 0.000 description 2
238000006460 hydrolysis reaction Methods 0.000 description 2
230000002401 inhibitory effect Effects 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000002184 metal Substances 0.000 description 2
150000002978 peroxides Chemical class 0.000 description 2
239000011591 potassium Substances 0.000 description 2
238000002360 preparation method Methods 0.000 description 2
229920006395 saturated elastomer Polymers 0.000 description 2
235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 2
BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
206010035148 Plague Diseases 0.000 description 1
DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
229910021536 Zeolite Inorganic materials 0.000 description 1
239000012190 activator Substances 0.000 description 1
150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
125000001931 aliphatic group Chemical group 0.000 description 1
229910052783 alkali metal Inorganic materials 0.000 description 1
150000001340 alkali metals Chemical class 0.000 description 1
125000003368 amide group Chemical group 0.000 description 1
KHPLPBHMTCTCHA-UHFFFAOYSA-N ammonium chlorate Chemical class N.OCl(=O)=O KHPLPBHMTCTCHA-UHFFFAOYSA-N 0.000 description 1
239000002585 base Substances 0.000 description 1
125000004432 carbon atom Chemical group C* 0.000 description 1
150000001768 cations Chemical class 0.000 description 1
239000003153 chemical reaction reagent Substances 0.000 description 1
239000008139 complexing agent Substances 0.000 description 1
239000000470 constituent Substances 0.000 description 1
238000007334 copolymerization reaction Methods 0.000 description 1
230000007423 decrease Effects 0.000 description 1
HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
239000012153 distilled water Substances 0.000 description 1
229920001971 elastomer Polymers 0.000 description 1
238000007720 emulsion polymerization reaction Methods 0.000 description 1
210000003608 fece Anatomy 0.000 description 1
238000000855 fermentation Methods 0.000 description 1
230000004151 fermentation Effects 0.000 description 1
JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
229960004337 hydroquinone Drugs 0.000 description 1
230000003993 interaction Effects 0.000 description 1
238000005259 measurement Methods 0.000 description 1
230000004899 motility Effects 0.000 description 1
229910017464 nitrogen compound Inorganic materials 0.000 description 1
150000002894 organic compounds Chemical class 0.000 description 1
239000007800 oxidant agent Substances 0.000 description 1
239000002685 polymerization catalyst Substances 0.000 description 1
239000011148 porous material Substances 0.000 description 1
DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 description 1
229940099427 potassium bisulfite Drugs 0.000 description 1
235000010259 potassium hydrogen sulphite Nutrition 0.000 description 1
230000001105 regulatory effect Effects 0.000 description 1
239000004576 sand Substances 0.000 description 1
AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
229940001474 sodium thiosulfate Drugs 0.000 description 1
235000019345 sodium thiosulphate Nutrition 0.000 description 1
150000003512 tertiary amines Chemical class 0.000 description 1
150000003573 thiols Chemical class 0.000 description 1
ORGHESHFQPYLAO-UHFFFAOYSA-N vinyl radical Chemical compound C=[CH] ORGHESHFQPYLAO-UHFFFAOYSA-N 0.000 description 1
239000010457 zeolite Substances 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/04—Polymerisation in solution
- C08F2/10—Aqueous solvent
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/935—Enhanced oil recovery
- Y10S507/936—Flooding the formation

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
General Life Sciences & Earth Sciences (AREA)
Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Oil, Petroleum & Natural Gas (AREA)
Health & Medical Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Medicinal Chemistry (AREA)
Polymers & Plastics (AREA)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Polymerization Catalysts (AREA)

DD81229491A 1980-06-20 1981-04-24 Mittel zur beweglichkeitsregelung eines flutungsmittels und anwendung desselben bei der sekundaeren und tertiaeren oelgewinnung DD160195A1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US06/161,547 US4383930A (en)	1980-06-20	1980-06-20	Mobility control agent

Publications (1)

Publication Number	Publication Date
DD160195A1 true DD160195A1 (de)	1983-05-11

Family

ID=22581626

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DD81229491A DD160195A1 (de)	1980-06-20	1981-04-24	Mittel zur beweglichkeitsregelung eines flutungsmittels und anwendung desselben bei der sekundaeren und tertiaeren oelgewinnung

Country Status (13)

Country	Link
US (1)	US4383930A (it)
JP (1)	JPS57500660A (it)
DD (1)	DD160195A1 (it)
ES (1)	ES8308338A1 (it)
FR (1)	FR2485081A1 (it)
GB (1)	GB2090624A (it)
IL (1)	IL62781A0 (it)
IT (1)	IT1211033B (it)
MA (1)	MA19166A1 (it)
NL (1)	NL8120224A (it)
OA (1)	OA06838A (it)
PL (1)	PL231185A1 (it)
WO (1)	WO1982000044A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4580627A (en) *	1981-06-19	1986-04-08	Marathon Oil Company	Oil recovery process and system
US4533478A (en) *	1983-04-18	1985-08-06	Standard Oil Company (Indiana)	3-Sulfoxy-1,2-propylene glycols-1-esters of tricyclo (4.2.2.02,5) dec-9-ene-3,4,7,8-tetracarboxylic acid
DE19651307A1 (de) *	1996-12-10	1998-06-18	Basf Ag	Stoffmischungen, enthaltend vinylgruppenhaltige Verbindungen und Stabilisatoren

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2380474A (en) *	1941-02-19	1945-07-31	Goodrich Co B F	Catalysts for the addition polymerization of unsaturated organic compounds
US2380476A (en) *	1941-02-19	1945-07-31	Goodrich Co B F	Catalysts for the addition polymerization of unsaturated organic compounds
US2380475A (en) *	1941-02-19	1945-07-31	Goodrich Co B F	Catalysts for the addition polymerization of unsaturated organic compounds
US2578910A (en) *	1948-06-01	1951-12-18	Phillips Petroleum Co	Polymerization of vinyl compounds in the presence of heterocyclic nitrogen compounds as activators
US2634258A (en) *	1950-07-14	1953-04-07	Goodrich Co B F	Process for the polymerization of unsaturated organic materials
US2697700A (en) *	1951-08-06	1954-12-21	Phillips Petroleum Co	Low temperature emulsion polymerization in polyamine systems containing heavy metal complex activators
DE1050063B (de) *	1954-09-22	1959-02-05	Wacker-Chemie G.m.b.H., München	Verfahren zur Herstellung von wasserunlöslichen stickstoffhaltigen Polymerisaten
US2934524A (en) *	1955-06-29	1960-04-26	Allied Chem	Process for copolymerizing acrylic compounds
US3020953A (en) *	1957-11-26	1962-02-13	Wintershall Ag	Secondary recovery of oil
US3002960A (en) *	1958-08-18	1961-10-03	American Cyanamid Co	Polyacrylamide preparation
US3112295A (en) *	1959-03-05	1963-11-26	Du Pont	Emulsion polymerization of water-soluble with water-insoluble monomers
US3039529A (en) *	1959-05-19	1962-06-19	Dow Chemical Co	Secondary recovery of petroleum
US3804173A (en) *	1971-07-01	1974-04-16	Dow Chemical Co	Method for reducing polymer adsorption in secondary oil recovery operations
US4145495A (en) *	1978-02-13	1979-03-20	American Cyanamid Company	Aqueous free-radical polymerization using redox system initiator that avoids adverse effects of polymerization inhibiting cations

1980
- 1980-06-20 US US06/161,547 patent/US4383930A/en not_active Expired - Lifetime
1981
- 1981-04-14 ES ES501385A patent/ES8308338A1/es not_active Expired
- 1981-04-17 JP JP56502086A patent/JPS57500660A/ja active Pending
- 1981-04-17 GB GB8201569A patent/GB2090624A/en not_active Withdrawn
- 1981-04-17 NL NL8120224A patent/NL8120224A/nl not_active Application Discontinuation
- 1981-04-17 WO PCT/US1981/000505 patent/WO1982000044A1/en not_active Ceased
- 1981-04-24 DD DD81229491A patent/DD160195A1/de unknown
- 1981-04-29 IT IT8121452A patent/IT1211033B/it active
- 1981-05-04 IL IL62781A patent/IL62781A0/xx unknown
- 1981-05-07 FR FR8109063A patent/FR2485081A1/fr active Pending
- 1981-05-15 PL PL23118581A patent/PL231185A1/xx unknown
- 1981-06-01 MA MA19375A patent/MA19166A1/fr unknown
- 1981-06-18 OA OA57427A patent/OA06838A/xx unknown

Also Published As

Publication number	Publication date
PL231185A1 (it)	1982-01-18
ES501385A0 (es)	1983-01-01
WO1982000044A1 (en)	1982-01-07
ES8308338A1 (es)	1983-01-01
US4383930A (en)	1983-05-17
IL62781A0 (en)	1981-07-31
NL8120224A (nl)	1982-05-03
GB2090624A (en)	1982-07-14
JPS57500660A (it)	1982-04-15
MA19166A1 (fr)	1981-12-31
IT1211033B (it)	1989-09-29
OA06838A (fr)	1983-02-28
FR2485081A1 (fr)	1981-12-24
IT8121452A0 (it)	1981-04-29

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