BR9201865A - Revestimento duro; peca de trabalho e processo de revestimento de uma peca de trabalho por um revestimento duro - Google Patents

Revestimento duro; peca de trabalho e processo de revestimento de uma peca de trabalho por um revestimento duro

Info

Publication number
BR9201865A
BR9201865A BR929201865A BR9201865A BR9201865A BR 9201865 A BR9201865 A BR 9201865A BR 929201865 A BR929201865 A BR 929201865A BR 9201865 A BR9201865 A BR 9201865A BR 9201865 A BR9201865 A BR 9201865A
Authority
BR
Brazil
Prior art keywords
piece
work
hard coating
finishing
hard
Prior art date
Application number
BR929201865A
Other languages
English (en)
Inventor
Hans Schulz
Erich Bergmann
Original Assignee
Balzers Hochvakuum
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
Application filed by Balzers Hochvakuum filed Critical Balzers Hochvakuum
Publication of BR9201865A publication Critical patent/BR9201865A/pt

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/40Oxides
    • C23C16/403Oxides of aluminium, magnesium or beryllium
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/08Oxides
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/40Oxides
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physical Vapour Deposition (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemical Vapour Deposition (AREA)
BR929201865A 1991-05-16 1992-05-18 Revestimento duro; peca de trabalho e processo de revestimento de uma peca de trabalho por um revestimento duro BR9201865A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH147091 1991-05-16

Publications (1)

Publication Number Publication Date
BR9201865A true BR9201865A (pt) 1993-01-05

Family

ID=4211238

Family Applications (1)

Application Number Title Priority Date Filing Date
BR929201865A BR9201865A (pt) 1991-05-16 1992-05-18 Revestimento duro; peca de trabalho e processo de revestimento de uma peca de trabalho por um revestimento duro

Country Status (8)

Country Link
US (2) US5310607A (pt)
EP (1) EP0513662B1 (pt)
JP (1) JP3323534B2 (pt)
KR (1) KR100236995B1 (pt)
CN (1) CN1035956C (pt)
AT (1) ATE134718T1 (pt)
BR (1) BR9201865A (pt)
DE (1) DE59205430D1 (pt)

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5516588A (en) * 1991-03-27 1996-05-14 Widia Gmbh Composite body, its use and a process for its production
DE59309954D1 (de) * 1992-12-21 2000-03-16 Balzers Hochvakuum Optisches Bauelement, Verfahren zur Herstellung einer Schicht, Schicht bzw. Schichtsystem und Verwendung des Bauelementes
CH688863A5 (de) 1994-06-24 1998-04-30 Balzers Hochvakuum Verfahren zum Beschichten mindestens eines Werkstueckes und Anlage hierfuer.
US5879823A (en) * 1995-12-12 1999-03-09 Kennametal Inc. Coated cutting tool
DE19830206C2 (de) * 1997-09-16 2001-08-23 Fraunhofer Ges Forschung Verfahren zur Beschichtung von Substraten mit Aluminiumoxid (Al¶2¶O¶3¶)
CN100413998C (zh) 2002-08-08 2008-08-27 株式会社神户制钢所 α型晶体结构为主体的氧化铝被膜相关技术
JP4427271B2 (ja) 2003-04-30 2010-03-03 株式会社神戸製鋼所 アルミナ保護膜およびその製造方法
US9771648B2 (en) * 2004-08-13 2017-09-26 Zond, Inc. Method of ionized physical vapor deposition sputter coating high aspect-ratio structures
US20050103620A1 (en) * 2003-11-19 2005-05-19 Zond, Inc. Plasma source with segmented magnetron cathode
EP1536041B1 (en) * 2003-11-25 2008-05-21 Mitsubishi Materials Corporation Coated cermet cutting tool with a chipping resistant, hard coating layer
JP4569746B2 (ja) * 2003-12-22 2010-10-27 三菱マテリアル株式会社 硬質被覆層がすぐれた耐チッピング性を発揮する表面被覆サーメット製切削工具
CN100445023C (zh) * 2003-12-22 2008-12-24 三菱综合材料株式会社 具有抗破碎性优异的硬涂层的表面涂覆金属陶瓷切削工具
US20050205415A1 (en) * 2004-03-19 2005-09-22 Belousov Igor V Multi-component deposition
DE102004044240A1 (de) * 2004-09-14 2006-03-30 Walter Ag Schneidwerkzeug mit oxidischer Beschichtung
EP2477207A3 (en) * 2004-09-24 2014-09-03 Zond, Inc. Apparatus for generating high-current electrical discharges
JP4780513B2 (ja) * 2005-01-21 2011-09-28 三菱マテリアル株式会社 硬質被覆層が高速切削加工ですぐれた耐チッピング性を発揮する表面被覆サーメット製切削工具
EP2355126B1 (de) * 2005-03-24 2015-12-02 Oerlikon Surface Solutions AG, Trübbach Hartstoffschicht
JP4730651B2 (ja) * 2005-04-19 2011-07-20 三菱マテリアル株式会社 耐熱合金の高速断続切削加工で硬質被覆層がすぐれた耐チッピング性を発揮する表面被覆サーメット製切削工具
SE529015C2 (sv) * 2005-09-09 2007-04-10 Sandvik Intellectual Property PVD-belagt skärverktygsskär tillverkat av hårdmetall
US7670674B2 (en) * 2005-09-09 2010-03-02 Sandvik Intellectual Property Ab PVD coated cutting tool
JP4761141B2 (ja) * 2006-03-16 2011-08-31 三菱マテリアル株式会社 難削材の高速切削加工で硬質被覆層がすぐれた耐チッピング性を発揮する表面被覆サーメット製切削スローアウエイチップ
US8071211B2 (en) * 2006-10-02 2011-12-06 Sumitomo Electric Industries, Ltd. Surface-coated cutting tool
AU2007306494B2 (en) * 2006-10-10 2012-05-31 Oerlikon Trading Ag, Truebbach Layer system having at least one mixed crystal layer of a polyoxide
US7939181B2 (en) * 2006-10-11 2011-05-10 Oerlikon Trading Ag, Trubbach Layer system with at least one mixed crystal layer of a multi-oxide
US9605338B2 (en) * 2006-10-11 2017-03-28 Oerlikon Surface Solutions Ag, Pfaffikon Method for depositing electrically insulating layers
US8129040B2 (en) * 2007-05-16 2012-03-06 Oerlikon Trading Ag, Truebbach Cutting tool
SE533395C2 (sv) * 2007-06-08 2010-09-14 Sandvik Intellectual Property Sätt att göra PVD-beläggningar
DE102007030734A1 (de) * 2007-07-02 2009-01-08 Walter Ag Beschichtetes Werkzeug
JP2009035784A (ja) 2007-08-02 2009-02-19 Kobe Steel Ltd 酸化物皮膜、酸化物皮膜被覆材および酸化物皮膜の形成方法
US7741659B2 (en) * 2007-10-25 2010-06-22 United Microelectronics Corp. Semiconductor device
JP2009120912A (ja) 2007-11-15 2009-06-04 Kobe Steel Ltd 硬質皮膜を備えた耐摩耗性部材
SE531933C2 (sv) 2007-12-14 2009-09-08 Seco Tools Ab Belagt hårdmetallskär för bearbetning av stål och rostfria stål
SE532048C2 (sv) 2008-03-07 2009-10-13 Seco Tools Ab Oxidbelagt skärverktygsskär för spånavskiljande bearbetning av stål
SE532050C2 (sv) * 2008-03-07 2009-10-13 Seco Tools Ab Oxidbelagt skärverktygsskär för spånavskiljande bearbetning av stål
SE532047C2 (sv) 2008-03-07 2009-10-13 Seco Tools Ab Oxidbelagt skärverktygsskär för spånavskiljande bearbetning av gjutjärn
SE532049C2 (sv) * 2008-03-07 2009-10-13 Seco Tools Ab Oxidbelagt skärverktygsskär för spånavskiljande bearbetning av stål
JP5234925B2 (ja) * 2008-04-03 2013-07-10 株式会社神戸製鋼所 硬質皮膜およびその形成方法ならびに硬質皮膜被覆部材
DE102008026358A1 (de) * 2008-05-31 2009-12-03 Walter Ag Werkzeug mit Metalloxidbeschichtung
JP5435326B2 (ja) * 2008-09-02 2014-03-05 日立金属株式会社 ダイカスト用被覆金型およびその製造方法
MX2011003838A (es) * 2008-10-10 2011-05-25 Oerlikon Trading Ag Gamma no - alcro fase cubico.
CZ305038B6 (cs) 2009-07-28 2015-04-08 Shm, S. R. O. Způsob vytváření ochranných a funkčních vrstev metodou PVD z katody se sníženou povrchovou elektrickou vodivostí
DE102009028579B4 (de) 2009-08-17 2013-08-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Beschichtete Körper aus Metall, Hartmetall, Cermet oder Keramik sowie Verfahren zur Beschichtung derartiger Körper
TW201135817A (en) * 2010-04-09 2011-10-16 Hon Hai Prec Ind Co Ltd Colourful multi-layer film structure and the method manufacturing the same
CN103052456B (zh) 2010-08-04 2015-04-22 株式会社图格莱 被覆工具
DE102010042828A1 (de) * 2010-10-22 2012-04-26 Walter Ag Target für Lichtbogenverfahren
JP5472529B2 (ja) * 2011-03-31 2014-04-16 日立ツール株式会社 硬質皮膜被覆部材及びそれを具備する刃先交換式回転工具
DE102011053372A1 (de) * 2011-09-07 2013-03-07 Walter Ag Werkzeug mit chromhaltiger Funktionsschicht
WO2014101517A1 (zh) * 2012-12-26 2014-07-03 Wu Shanghua 一种采用物理气相沉积工艺在氮化硅切削刀具表面制备Al2O3涂层及其复合涂层的方法
DE112014001562B4 (de) 2013-03-21 2019-08-08 Kennametal Inc. Beschichtungen für Schneidwerkzeuge
US9371580B2 (en) 2013-03-21 2016-06-21 Kennametal Inc. Coated body wherein the coating scheme includes a coating layer of TiAl2O3 and method of making the same
US9181620B2 (en) 2013-03-21 2015-11-10 Kennametal Inc. Coatings for cutting tools
KR102252440B1 (ko) * 2013-11-03 2021-05-17 오를리콘 서피스 솔루션스 아크티엔게젤샤프트, 페피콘 산화 장벽 층
EP3088108A4 (en) * 2013-12-26 2017-08-09 Kyocera Corporation Cutting tool
DE102014104672A1 (de) * 2014-04-02 2015-10-08 Kennametal Inc. Beschichtetes Schneidwerkzeug und Verfahren zu seiner Herstellung
US9719175B2 (en) 2014-09-30 2017-08-01 Kennametal Inc. Multilayer structured coatings for cutting tools
US9650714B2 (en) 2014-12-08 2017-05-16 Kennametal Inc. Nanocomposite refractory coatings and applications thereof
US9650712B2 (en) 2014-12-08 2017-05-16 Kennametal Inc. Inter-anchored multilayer refractory coatings
DE102016108734B4 (de) 2016-05-11 2023-09-07 Kennametal Inc. Beschichteter Körper und Verfahren zur Herstellung des Körpers
DE102016212874A1 (de) * 2016-07-14 2018-01-18 Oerlikon Surface Solutions Ag, Pfäffikon Schutzbeschichtung für eine thermisch beanspruchte Struktur
CN106399930A (zh) * 2016-09-28 2017-02-15 华南理工大学 一种合金钢表面渗氮后原位pvd镀膜的一体化复合处理方法
WO2019053257A1 (en) * 2017-09-15 2019-03-21 Oerlikon Surface Solutions Ag, Pfäffikon AL-CR-O COATINGS HAVING SUPERIOR THERMAL STABILITY AND PROCESS FOR PRODUCING THE SAME

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511703A (en) * 1963-09-20 1970-05-12 Motorola Inc Method for depositing mixed oxide films containing aluminum oxide
US3837894A (en) * 1972-05-22 1974-09-24 Union Carbide Corp Process for producing a corrosion resistant duplex coating
US3990860A (en) * 1975-11-20 1976-11-09 Nasa High temperature oxidation resistant cermet compositions
US4052530A (en) * 1976-08-09 1977-10-04 Materials Technology Corporation Co-deposited coating of aluminum oxide and titanium oxide and method of making same
SE406090B (sv) * 1977-06-09 1979-01-22 Sandvik Ab Belagd hardmetallkropp samt sett att framstalla en dylik kropp
ATA261878A (de) * 1978-04-14 1979-05-15 Ver Edelstahlwerke Ag Verfahren zur herstellung beschichteter hart- metallkoerper
US4357382A (en) * 1980-11-06 1982-11-02 Fansteel Inc. Coated cemented carbide bodies
US4495907A (en) * 1983-01-18 1985-01-29 Cummins Engine Company, Inc. Combustion chamber components for internal combustion engines
US4540596A (en) * 1983-05-06 1985-09-10 Smith International, Inc. Method of producing thin, hard coating
US4615913A (en) * 1984-03-13 1986-10-07 Kaman Sciences Corporation Multilayered chromium oxide bonded, hardened and densified coatings and method of making same
US4668585A (en) * 1984-06-08 1987-05-26 Osaka Prefecture, Horonobu Oonishi and Kyocera Corporation Fe-Cr-Al type implant alloy composite for medical treatment
US4822689A (en) * 1985-10-18 1989-04-18 Union Carbide Corporation High volume fraction refractory oxide, thermal shock resistant coatings

Also Published As

Publication number Publication date
CN1035956C (zh) 1997-09-24
EP0513662B1 (de) 1996-02-28
EP0513662A1 (de) 1992-11-19
ATE134718T1 (de) 1996-03-15
US5310607A (en) 1994-05-10
JPH05208326A (ja) 1993-08-20
KR920021734A (ko) 1992-12-18
JP3323534B2 (ja) 2002-09-09
CN1069294A (zh) 1993-02-24
KR100236995B1 (ko) 2000-01-15
US5447804A (en) 1995-09-05
DE59205430D1 (de) 1996-04-04

Similar Documents

Publication Publication Date Title
BR9201865A (pt) Revestimento duro; peca de trabalho e processo de revestimento de uma peca de trabalho por um revestimento duro
ATE179222T1 (de) Oxidbeschichtetes schneidwerkzeug
SE9203852L (sv) Oxidbelagt skärande verktyg
DE59304009D1 (de) Verwendung von interferenzpigmenten zur herstellung von fälschungssicheren wertschriften
UA7138A1 (uk) Спосіб одержання 1,1,1-трифтор-2,2-діхлоретана
BR9406129A (pt) Composição endurecível para um revestimento resistente a abrasão processo para sua preparacão e produtos e artigos obtidos
DK0651737T3 (da) O-Benzyloximetherderivater samt deres anvendelse som pesticider
EP0240451A3 (en) Single crystal articles having reduced anisotropy
PH23497A (en) Disordered coating and method
SE9501383L (sv) Hårdmetall med bindefasanrikad ytzon
SE8405924L (sv) Nya azoforeningar
KR900000502A (ko) 대상물에 대한 흑색코팅의 용착방법 및 그로부터 수득된 흑색코팅물
ES2116724T3 (es) Compuestos basicos de reticulos estratificados.
CA2152228A1 (en) Process for the production of heat- and corrosion- resistant porous met al body
KR880001841A (ko) 표면처리 방법 및 표면처리제
ES2087419T3 (es) Procedimiento de purificacion de 1,1,1,2-tetrafluoro-etano.
DE69213265D1 (de) Whisker verstärkte-Verbundstoffe für Schneidewerkzeuge mit verbesserter Leistung
AU1139597A (en) Method for the colouring of ceramic surfaces
RU94033348A (ru) Компонент катализатора для каталитических превращений углеводородов в нефтехимических процессах
ATE163632T1 (de) Oxynitrid-glaszusammensetzungen, ihre vorläufer und ihre verwendung zur herstellung von glaskeramikzusammensetzungen und von verbundwerkstoffen
DE3880114D1 (de) Nickellegierung mit hohem chromgehalt.
Doliwa The Use of a High-Performance Ceramic With the Object of Increasing Plant Service Factors
SU1537709A1 (ru) Состав дл комплексной химико-термической обработки твердосплавного инструмента
Eichen et al. Multilayer Coating Including Disordered, Wear Resistant Boron Carbon External Coating
CH660278GA3 (en) Process for the manufacture of a watch case

Legal Events

Date Code Title Description
EE Request for examination
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FF Decision: intention to grant
FG9A Patent or certificate of addition granted
TC Change of name
B25D Requested change of name of applicant approved

Owner name: OC OERLIKON BALZERS AG (LI)

Free format text: NOME ALTERADO DE: UNAXIS BALZERS AKTIENGESELLSCHAFT

B25A Requested transfer of rights approved

Owner name: OERLIKON TRADING AG, TRUBBACH (CH)

Free format text: TRANSFERIDO DE: OC OERLIKON BALZERS AG

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 18/05/2012