BR8204995A - Processo de transformacao de materia lenhosa no estado fragmentado e materia lenhosa de origem vegetal - Google Patents
Processo de transformacao de materia lenhosa no estado fragmentado e materia lenhosa de origem vegetalInfo
- Publication number
- BR8204995A BR8204995A BR8204995A BR8204995A BR8204995A BR 8204995 A BR8204995 A BR 8204995A BR 8204995 A BR8204995 A BR 8204995A BR 8204995 A BR8204995 A BR 8204995A BR 8204995 A BR8204995 A BR 8204995A
- Authority
- BR
- Brazil
- Prior art keywords
- materia
- wood
- vegetable origin
- wool
- transformation
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
- C10L9/083—Torrefaction
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Chemical & Material Sciences (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8116463A FR2512053B1 (fr) | 1981-08-28 | 1981-08-28 | Procede de transformation de matiere ligneuse d'origine vegetale et matiere d'origine vegetale ligneuse transformee par torrefaction |
Publications (1)
Publication Number | Publication Date |
---|---|
BR8204995A true BR8204995A (pt) | 1983-08-02 |
Family
ID=9261745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR8204995A BR8204995A (pt) | 1981-08-28 | 1982-08-26 | Processo de transformacao de materia lenhosa no estado fragmentado e materia lenhosa de origem vegetal |
Country Status (9)
Country | Link |
---|---|
US (1) | US4553978A (pt) |
EP (1) | EP0073714B1 (pt) |
AT (1) | ATE10751T1 (pt) |
BR (1) | BR8204995A (pt) |
CA (1) | CA1188099A (pt) |
DE (1) | DE3261552D1 (pt) |
ES (1) | ES8306173A1 (pt) |
FR (1) | FR2512053B1 (pt) |
PT (1) | PT75451B (pt) |
Families Citing this family (72)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2521592B1 (fr) * | 1982-02-12 | 1986-06-27 | Armines | Procede pour l'execution de reactions reductrices en metallurgie et produit utilise |
FR2529904A1 (fr) * | 1982-07-06 | 1984-01-13 | Armines | Procede d'hydrogenolyse de matieres d'origine ligno-cellulosique |
WO1986006930A1 (fr) * | 1985-05-24 | 1986-12-04 | Clerc De Bussy Le | Procede d'obtention de bois torrefie, produit obtenu, et application a la production d'energie |
FR2582189B1 (fr) * | 1985-05-24 | 1988-06-10 | Clerc De Bussy Le | Procede de production et de recolte d'un produit ligneux torrefiable |
FR2591611B1 (fr) * | 1985-12-18 | 1988-11-10 | Armines | Nouveau materiau ligno-cellulosique thermocondense, procede et four pour l'obtenir. |
FR2614625A1 (fr) * | 1987-04-30 | 1988-11-04 | Haberman Andre | Produit ligno-cellulosique torrefie a faible teneur en benzopyrene, son procede de fabrication et l'appareillage necessaire a la mise en oeuvre dudit procede |
US5435983A (en) * | 1990-07-02 | 1995-07-25 | University Of Hawaii | Process for charcoal production from woody and herbaceous plant material |
US5110785A (en) * | 1991-05-01 | 1992-05-05 | Reed Thomas B | Composition of matter and method of making |
GB9126676D0 (en) * | 1991-12-16 | 1992-02-12 | Jones David | Wood product |
US5264623A (en) * | 1993-01-04 | 1993-11-23 | Energy Mines & Resources Canada | Method of producing calcium salts from biomass |
NZ248884A (en) * | 1993-10-07 | 1995-10-26 | Convertech Group Ltd | Hydrolysis and/or drying of biological material with steam |
NZ248895A (en) * | 1993-10-08 | 1995-07-26 | Convertech Group Ltd | Transfer device having intermittently rotated carousel having through passageways with assembly sealing pressure maximised during rotor dwell periods |
US5478366A (en) * | 1994-09-28 | 1995-12-26 | The University Of British Columbia | Pumpable lignin fuel |
FR2775292B1 (fr) * | 1998-02-20 | 2002-04-19 | Agresta | Procede et dispositif de traitement thermique de materiaux comportant des fibres ligno-cellulosiques |
FR2781180B1 (fr) | 1998-07-17 | 2000-09-29 | Fours Et Bruleurs Rey | Reacteur de retification du bois |
US6827854B2 (en) * | 2001-04-11 | 2004-12-07 | The Procter + Gamble Co. | Filters and filter materials for the removal of microorganisms and processes for using the same |
AU2001275621B2 (en) * | 2001-07-17 | 2006-12-21 | Wen-Xi Liang | Oxidative thermochemical drying process for changing hydrophilic/hydrophobic characteristics of natural organic substances |
US8197561B2 (en) | 2001-10-10 | 2012-06-12 | River Basin Energy, Inc. | Process for drying coal |
US20030221363A1 (en) * | 2002-05-21 | 2003-12-04 | Reed Thomas B. | Process and apparatus for making a densified torrefied fuel |
FR2846269B1 (fr) * | 2002-10-28 | 2004-12-24 | Jean Laurencot | Procede pour traiter une charge de matiere ligneuse composee d'elements empiles, notamment une charge de bois, par traitement thermique a haute temperature |
NL1030864C2 (nl) * | 2006-01-06 | 2007-07-09 | Stichting Energie | Werkwijze en inrichting voor het behandelen van biomassa. |
DE602007011124D1 (de) | 2006-02-07 | 2011-01-27 | Colt Engineering Corp | Mit Kohlendioxid angereicherte Rauchgaseinspritzung zur Kohlenwasserstoffgewinnung |
US7942942B2 (en) * | 2006-05-21 | 2011-05-17 | Paoluccio John A | Method and apparatus for biomass torrefaction, manufacturing a storable fuel from biomass and producing offsets for the combustion products of fossil fuels and a combustible article of manufacture |
US8449631B2 (en) * | 2007-03-18 | 2013-05-28 | John A. Paoluccio | Method and apparatus for biomass torrefaction using conduction heating |
US20080256851A1 (en) * | 2007-04-23 | 2008-10-23 | Lumb Kevin D | Compressed Fuel Product Using Flax Straw Derivative |
CN102047058A (zh) * | 2008-04-03 | 2011-05-04 | 北卡罗来纳州立大学 | 移动式自热烘焙装置 |
FR2930473B1 (fr) | 2008-04-29 | 2013-07-12 | Antoine Royal | Procede de fabrication d'un materiau agglomere et profile et cercueil fabrique avec ce materiau. |
US8288599B2 (en) | 2008-06-30 | 2012-10-16 | Kior, Inc. | Co-processing solid biomass in a conventional petroleum refining process unit |
WO2010002886A1 (en) * | 2008-06-30 | 2010-01-07 | Kior, Inc. | Producing fuel and speciality chemicals from biomass containing triglycerides and cellulose |
EP2318487B1 (en) | 2008-07-04 | 2019-05-01 | University of York | Microwave torrefaction of biomass |
US8161663B2 (en) | 2008-10-03 | 2012-04-24 | Wyssmont Co. Inc. | System and method for drying and torrefaction |
US8669404B2 (en) | 2008-10-15 | 2014-03-11 | Renewable Fuel Technologies, Inc. | Method for conversion of biomass to biofuel |
WO2010068773A1 (en) * | 2008-12-10 | 2010-06-17 | Kior Inc. | Process for preparing a fluidizable biomass-catalyst composite material |
CN102308171A (zh) * | 2009-02-04 | 2012-01-04 | 国际壳牌研究有限公司 | 转化生物质的方法 |
US8276289B2 (en) | 2009-03-27 | 2012-10-02 | Terra Green Energy, Llc | System and method for preparation of solid biomass by torrefaction |
CA2759954A1 (en) | 2009-05-22 | 2010-11-25 | Robert Bartek | Processing biomass with a hydrogen source |
EP2284141A1 (de) | 2009-08-12 | 2011-02-16 | Leibniz-Institut für Agrartechnik Potsdam-Bornim e.V. (ATB) | Verfahren und Vorrichtung zur Herstellung von mit Mineralstoffen angereicherten Kohlepartikeln |
US8449724B2 (en) | 2009-08-19 | 2013-05-28 | Andritz Technology And Asset Management Gmbh | Method and system for the torrefaction of lignocellulosic material |
CA2686099A1 (en) * | 2009-10-05 | 2011-04-05 | Mark A. Lowe | Oil impregnated particulate biomass, methods of manufacture and use thereof |
US20110179701A1 (en) * | 2010-01-27 | 2011-07-28 | G-Energy Technologies, Llc | Torrefaction of ligno-cellulosic biomasses and mixtures |
EP2545146A4 (en) * | 2010-03-08 | 2014-05-07 | Arthur M Shulenberger | DEVICE AND METHOD FOR CONVERTING THE BIOMARBURIZED BIOMASS |
US9057037B2 (en) | 2010-04-20 | 2015-06-16 | River Basin Energy, Inc. | Post torrefaction biomass pelletization |
US8956426B2 (en) | 2010-04-20 | 2015-02-17 | River Basin Energy, Inc. | Method of drying biomass |
WO2011154845A2 (en) * | 2010-06-08 | 2011-12-15 | Hillel Peter Harris Kenneth | Methods for making animal feed from lignocellulosic biomass |
US8246788B2 (en) | 2010-10-08 | 2012-08-21 | Teal Sales Incorporated | Biomass torrefaction system and method |
WO2012101518A1 (en) | 2011-01-25 | 2012-08-02 | Giuliano Grassi | Apparatus and process for torrefaction of ligno-cellulosic biomasses and mixtures with liquids |
US8951308B2 (en) | 2011-03-17 | 2015-02-10 | Solazyme, Inc. | Pyrolysis oil and other combustible compositions from microbial biomass |
WO2012134907A2 (en) | 2011-03-25 | 2012-10-04 | Breneman William C | Refined torrefied biomass |
EP4219659A3 (en) * | 2011-04-15 | 2023-10-11 | Carbon Technology Holdings, LLC | Processes for producing high-carbon biogenic reagents |
PL395214A1 (pl) | 2011-06-10 | 2012-12-17 | Stanislaw Rogut | Sposób wytwarzania sorbentów weglowych |
US8203024B2 (en) | 2011-08-23 | 2012-06-19 | Advanced Toffefaction Systems, LLC | Torrefaction systems and methods including catalytic oxidation and/or reuse of combustion gases directly in a torrefaction reactor, cooler, and/or dryer/preheater |
US8198493B1 (en) * | 2012-01-11 | 2012-06-12 | Earth Care Products, Inc. | High energy efficiency biomass conversion process |
US8388813B1 (en) * | 2012-01-11 | 2013-03-05 | Earth Care Products, Inc. | High energy efficiency biomass conversion process |
JP6169323B2 (ja) * | 2012-03-30 | 2017-07-26 | 日本製紙株式会社 | 固体燃料の製造方法及び固体燃料 |
CA3225246A1 (en) | 2012-05-07 | 2013-11-14 | Carbon Technology Holdings, LLC | Biogenic activated carbon and methods of making and using same |
US20140283439A1 (en) * | 2013-03-21 | 2014-09-25 | Syngas Technology, Llc | Pretreatment of Biomass Feed for Gasification |
WO2015061701A1 (en) | 2013-10-24 | 2015-04-30 | Biogenic Reagent Ventures, Llc | Methods and apparatus for producing activated carbon from biomass through carbonized ash intermediates |
BR112016016552B1 (pt) | 2014-01-16 | 2022-01-04 | Carbon Technology Holdings, LLC | Processo para biorrefinamento para coproduzir carvão ativado juntamente com produtos primários |
WO2015127460A1 (en) | 2014-02-24 | 2015-08-27 | Biogenic Reagent Ventures, Llc | Highly mesoporous activated carbon |
WO2016065357A1 (en) | 2014-10-24 | 2016-04-28 | Biogenic Reagent Ventures, Llc | Halogenated activated carbon compositions and methods of making and using same |
US10066179B2 (en) | 2015-02-20 | 2018-09-04 | Integro Earth Fuels, Inc. | High energy content densified lignocellulose biomass |
FR3032903B1 (fr) * | 2015-02-23 | 2017-07-21 | Neolife | Procede de fabrication d’un materiau de type bois reconstitue |
US10167428B2 (en) * | 2015-06-01 | 2019-01-01 | Central Michigan University | Methods for biomass torrefaction with carbon dioxide capture |
ES2687495T3 (es) | 2015-12-07 | 2018-10-25 | SWISS KRONO Tec AG | Procedimiento para la fabricación de un tablero de material derivado de la madera con emisión reducida de compuestos orgánicos volátiles (VOC) |
CN108865196B (zh) * | 2018-06-30 | 2021-11-02 | 邢献军 | 一种生物炭制备方法 |
US11124724B2 (en) | 2018-12-05 | 2021-09-21 | Hm3 Energy, Inc. | Method for producing a water-resistant, compressed biomass product |
FR3103358B1 (fr) * | 2019-11-27 | 2024-07-05 | Commissariat Energie Atomique | Procédé de nettoyage et d’élimination des tanins présents dans des coques de fruits à coque par torréfaction, Utilisation des coques de fruits à coques torréfiées en tant qu’adsorbants de liquide contaminés. |
EP4324947A3 (en) | 2020-09-25 | 2024-07-17 | Carbon Technology Holdings, LLC | Bio-reduction of metal ores integrated with biomass pyrolysis |
CN117015514A (zh) | 2021-02-18 | 2023-11-07 | 卡本科技控股有限责任公司 | 碳负冶金产品 |
MX2023012638A (es) | 2021-04-27 | 2024-01-12 | Carbon Tech Holdings Llc | Composiciones de biocarbón con carbono fijado optimizado y procesos para producir las mismas. |
WO2023283289A1 (en) | 2021-07-09 | 2023-01-12 | Carbon Technology Holdings, LLC | Processes for producing biocarbon pellets with high fixed-carbon content and optimized reactivity, and biocarbon pellets obtained therefrom |
CA3237226A1 (en) | 2021-11-12 | 2023-05-19 | Carbon Technology Holdings, LLC | Biocarbon compositions with optimized compositional parameters, and processes for producing the same |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2289917A (en) * | 1942-07-14 | Process of continuous carbonization | ||
US1015519A (en) * | 1908-05-16 | 1912-01-23 | Rudolf Strobach | Process of distilling wood. |
US2106973A (en) * | 1931-04-13 | 1938-02-01 | Standard Ig Co | Hydrogenation of high oxygen coal |
US2151166A (en) * | 1935-04-26 | 1939-03-21 | Gewerkschaft Auguste | Process of treating cellulosic material |
US2177557A (en) * | 1937-02-24 | 1939-10-24 | Method of treating wood or lignine | |
FR847112A (fr) * | 1938-06-10 | 1939-10-03 | Belge Produits Chimiques Sa | Mode de traitement de combustibles solides ou liquides en vue de modifier certaines de leurs propriétés |
FR860188A (fr) * | 1939-06-16 | 1941-01-08 | Belge Produits Chimiques Sa | Perfectionnements au traitement préalable des corps organiques en vue de leur hydrogénation destructive |
US2328749A (en) * | 1939-07-15 | 1943-09-07 | Henry A Wallace | Process for simultaneously manufacturing pulp and hydrogenated products from lignocellulose |
CH228877A (fr) * | 1941-02-22 | 1943-09-30 | Seneze Marcel | Procédé de fabrication d'agglomérés combustibles formés, au moins pour leur plus grande partie, à partir de matières ligneuses, et produit obtenu d'après ce procédé. |
FR933026A (fr) * | 1946-08-28 | 1948-04-08 | Nac Calvo Sotelo Empresa | Procédé d'obtention de combustibles, de lubrifiants et de produits divers à l'aide de matières ligno-cellulosiques |
FR953004A (fr) * | 1948-07-05 | 1949-11-29 | Procédé de traitement du bois, en vue de l'obtention, par agglomération, de produits moulés | |
US2725346A (en) * | 1954-07-30 | 1955-11-29 | Cumberland Corp | Method for producing furfural and charcoal |
US3223698A (en) * | 1961-01-09 | 1965-12-14 | Inst Noguchi | Method for liquefying lignin |
US3928677A (en) * | 1972-12-08 | 1975-12-23 | Firewood Inc | Process of treating wood |
US4052292A (en) * | 1976-03-05 | 1977-10-04 | Mobil Oil Corporation | Liquefaction of solid carbonaceous materials |
US4118281A (en) * | 1977-04-15 | 1978-10-03 | Mobil Oil Corporation | Conversion of solid wastes to fuel coke and gasoline/light oil |
FR2418005A1 (fr) * | 1978-02-28 | 1979-09-21 | Ben Abdallah Ahmed | Combustible, materiaux a base vegetale, conservation des vegetaux comestibles et nouveaux produits ainsi obtenus |
US4273643A (en) * | 1979-10-01 | 1981-06-16 | Bennett Engineering Inc. | Process for production of synthetic crude oil, alcohols, and chars during low temperature carbonization of coals |
-
1981
- 1981-08-28 FR FR8116463A patent/FR2512053B1/fr not_active Expired
-
1982
- 1982-08-16 CA CA000409509A patent/CA1188099A/fr not_active Expired
- 1982-08-20 ES ES515150A patent/ES8306173A1/es not_active Expired
- 1982-08-23 US US06/410,636 patent/US4553978A/en not_active Expired - Lifetime
- 1982-08-23 PT PT75451A patent/PT75451B/pt not_active IP Right Cessation
- 1982-08-25 AT AT82401576T patent/ATE10751T1/de not_active IP Right Cessation
- 1982-08-25 EP EP82401576A patent/EP0073714B1/fr not_active Expired
- 1982-08-25 DE DE8282401576T patent/DE3261552D1/de not_active Expired
- 1982-08-26 BR BR8204995A patent/BR8204995A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE10751T1 (de) | 1984-12-15 |
FR2512053A1 (fr) | 1983-03-04 |
DE3261552D1 (en) | 1985-01-24 |
PT75451A (fr) | 1982-09-01 |
CA1188099A (fr) | 1985-06-04 |
EP0073714B1 (fr) | 1984-12-12 |
US4553978A (en) | 1985-11-19 |
EP0073714A2 (fr) | 1983-03-09 |
ES515150A0 (es) | 1983-05-01 |
EP0073714A3 (en) | 1983-05-18 |
PT75451B (fr) | 1984-11-19 |
ES8306173A1 (es) | 1983-05-01 |
FR2512053B1 (fr) | 1985-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B21A | Patent or certificate of addition expired [chapter 21.1 patent gazette] |
Free format text: PATENTE EXTINTA EM 26/08/97 |