IT1079485B - Composti silicoorganici di elevato peso molecolare e procedimento per produrli - Google Patents
Composti silicoorganici di elevato peso molecolare e procedimento per produrliInfo
- Publication number
- IT1079485B IT1079485B IT48214/77A IT4821477A IT1079485B IT 1079485 B IT1079485 B IT 1079485B IT 48214/77 A IT48214/77 A IT 48214/77A IT 4821477 A IT4821477 A IT 4821477A IT 1079485 B IT1079485 B IT 1079485B
- Authority
- IT
- Italy
- Prior art keywords
- compounds
- procedure
- produce
- molecular weight
- high molecular
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/48—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
- C01B32/977—Preparation from organic compounds containing silicon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
- C04B35/571—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained from Si-containing polymer precursors or organosilicon monomers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6316—Binders based on silicon compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/60—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which all the silicon atoms are connected by linkages other than oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/85—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by XPS, EDX or EDAX data
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/10—Solid density
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/32—Thermal properties
- C01P2006/33—Phase transition temperatures
- C01P2006/34—Melting temperatures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/90—Other properties not specified above
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Ceramic Products (AREA)
- Carbon And Carbon Compounds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Silicon Polymers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2136576A JPS52112700A (en) | 1976-02-28 | 1976-02-28 | Amorphous organopolysilicone composite for preparing silicone carbide |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1079485B true IT1079485B (it) | 1985-05-13 |
Family
ID=12053057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT48214/77A IT1079485B (it) | 1976-02-28 | 1977-02-25 | Composti silicoorganici di elevato peso molecolare e procedimento per produrli |
Country Status (9)
Country | Link |
---|---|
US (1) | US4159259A (it) |
JP (1) | JPS52112700A (it) |
CA (1) | CA1102483A (it) |
DE (2) | DE2760031C2 (it) |
FR (1) | FR2345477A1 (it) |
GB (1) | GB1579982A (it) |
IT (1) | IT1079485B (it) |
SE (2) | SE432260B (it) |
SU (1) | SU776565A3 (it) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2009196B (en) * | 1977-10-26 | 1982-04-15 | Res Inst For Special Inorganic | Polycarbosilane process for its prudiction and its use as material for producing silicon carbide |
JPS6016385B2 (ja) * | 1977-12-28 | 1985-04-25 | 日本カ−ボン株式会社 | 可撓性黒鉛製品の製造法 |
IT1113320B (it) * | 1978-05-30 | 1986-01-20 | Dow Corning | Metodo perfezionamto per la preparazione del carburo di silicio |
JPS55158117A (en) * | 1979-05-29 | 1980-12-09 | Dow Corning | Method of making silicon carbide |
US4342712A (en) * | 1979-06-28 | 1982-08-03 | Ube Industries, Ltd. | Process for producing continuous inorganic fibers |
US4347347A (en) * | 1979-06-28 | 1982-08-31 | Ube Industries, Ltd. | Crosslinked organometallic block copolymers and process for production thereof |
DE3070473D1 (en) * | 1979-11-21 | 1985-05-15 | Ube Industries | Polymetallocarbosilane, process for its production and shaped articles of inorganic carbide derived therefrom |
US4336215A (en) * | 1979-11-30 | 1982-06-22 | Ube Industries, Ltd. | Sintered ceramic body and process for production thereof |
JPS56109810A (en) * | 1980-01-31 | 1981-08-31 | Kurosaki Refract Co Ltd | Novel ceramic and its manufacture |
US4556526A (en) * | 1980-03-25 | 1985-12-03 | Ube Industries, Ltd. | Process for production of sintered ceramic body |
JPS56147827A (en) * | 1980-04-17 | 1981-11-17 | Seishi Yajima | Organometallic polymer and its preparation |
JPS5756522A (en) * | 1980-09-24 | 1982-04-05 | Seishi Yajima | Novel continuous inorganic fiber and its preparation |
US4340619A (en) * | 1981-01-15 | 1982-07-20 | Dow Corning Corporation | Process for the preparation of poly(disilyl)silazane polymers and the polymers therefrom |
US4312970A (en) * | 1981-02-20 | 1982-01-26 | Dow Corning Corporation | Silazane polymers from {R'3 Si}2 NH and organochlorosilanes |
US4590253A (en) * | 1981-08-26 | 1986-05-20 | Kurosaki Refractoris Co., Ltd. | Organosilicon polymer and process for production thereof |
DE3203659A1 (de) * | 1982-02-03 | 1983-08-11 | Nippon Carbon Co., Ltd., Tokyo | Verfahren zum herstellen eines sinterkoerpers |
JPS59174575A (ja) * | 1983-03-18 | 1984-10-03 | 日本曹達株式会社 | 炭化ケイ素成形体の製造方法 |
US4548690A (en) * | 1984-02-28 | 1985-10-22 | Minnesota Mining And Manufacturing Company | Photoactivated polymerization of vinyl monomers in the presence of polysilanes and amines |
US4482689A (en) * | 1984-03-12 | 1984-11-13 | Dow Corning Corporation | Process for the preparation of polymetallo(disily)silazane polymers and the polymers therefrom |
FR2581391B1 (fr) * | 1985-05-06 | 1987-06-05 | Rhone Poulenc Rech | Composition organo-polysilazane comportant des generateurs de radicaux libres et reticulable par apport d'energie |
US4631179A (en) * | 1985-05-28 | 1986-12-23 | Ethyl Corporation | Process for the production of silicon carbide by the pyrolysis of a polycarbosilane polymer |
US4879334A (en) * | 1986-03-11 | 1989-11-07 | The Foundation: The Research Institute For Special Inorganic Materials | Organopolyarylsilanes, process for manufacturing the same and fibers comprising the same |
DE3707224A1 (de) * | 1987-03-06 | 1988-09-15 | Wacker Chemie Gmbh | Verfahren zur herstellung eines schutzueberzuges auf basis von siliciumcarbid |
US4835238A (en) * | 1987-06-08 | 1989-05-30 | Dow Corning Corporation | Polysilacyclobutasilazanes |
US4774312A (en) * | 1987-06-08 | 1988-09-27 | Dow Corning Corporation | Polydisilacyclobutasilazanes |
US4906710A (en) * | 1988-10-31 | 1990-03-06 | Dow Corning Corporation | Preceramic metallopolysilanes |
US5006584A (en) * | 1988-11-23 | 1991-04-09 | Chevron Research And Technology Company | Polydialkylsilalkylene polymer useful in enhanced oil recovery using carbon dioxide flooding |
US5229481A (en) * | 1991-03-28 | 1993-07-20 | The Regents Of The University Of California | High-molecular weight, silicon-containing polymers and methods for the preparation and use thereof |
US5292830A (en) * | 1991-06-20 | 1994-03-08 | Tonen Corporation | Thermosetting copolymers, silicon carbide-based fiber and processes for producing same |
US5700400A (en) * | 1993-06-15 | 1997-12-23 | Nippon Oil Co., Ltd. | Method for producing a semiconducting material |
DE4426978A1 (de) * | 1994-07-29 | 1996-02-08 | Johann Wilhelm Mueller | Pflastersteine und Palisaden mit Holzstruktur |
US5668188A (en) * | 1996-01-16 | 1997-09-16 | Sandia Corporation | Process for preparing silicon carbide foam |
WO2001019753A1 (fr) * | 1999-09-13 | 2001-03-22 | Japan Science And Technology Corporation | Polymere organometallique ponte utilisable dans la preparation de materiau ceramique composite et procede de production |
US6761975B1 (en) * | 1999-12-23 | 2004-07-13 | Honeywell International Inc. | Polycarbosilane adhesion promoters for low dielectric constant polymeric materials |
AU2001273134A1 (en) * | 2000-06-30 | 2002-02-05 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Linear chemoselective carbosilane polymers and methods for use in analytical and purification applications |
US6627126B2 (en) * | 2001-07-16 | 2003-09-30 | United Technologies Corporation | Method for preparing refractory carbides |
JP2006152063A (ja) * | 2004-11-26 | 2006-06-15 | Jsr Corp | 新規ポリカルボシランおよびその製造方法、膜形成用組成物、ならびに膜およびその形成方法 |
WO2011031184A1 (ru) * | 2009-09-10 | 2011-03-17 | Stepanov Nikolay Victorovich | Способ получения композиционного материала |
US8431189B2 (en) | 2009-12-22 | 2013-04-30 | Korea University Research And Business Foundation | Carbon nanotube-nanofiber composite structure |
DE102010037278A1 (de) | 2010-09-02 | 2012-03-08 | Hans Freitag | Verfahren zum Herstellen von Silizium-basierenden Schichten oder Silizium-basierenden Strukturen unter Verwendung von Silizium-enthaltenden Tinten |
RU2453550C1 (ru) * | 2011-03-09 | 2012-06-20 | Федеральное государственное унитарное предприятие "Государственный ордена Трудового Красного Знамени научно-исследовательский институт химии и технологии элементоорганических соединений" (ФГУП ГНИИХТЭОС) | Способ получения иттрийсодержащих органоалюмоксансилоксанов, связующие и пропиточные композиции на их основе |
DE102012221669A1 (de) * | 2012-11-27 | 2014-05-28 | Evonik Industries Ag | Verfahren zum Herstellen kohlenstoffhaltiger Hydridosilane |
US10167366B2 (en) * | 2013-03-15 | 2019-01-01 | Melior Innovations, Inc. | Polysilocarb materials, methods and uses |
CN108623812A (zh) * | 2017-03-23 | 2018-10-09 | 中国科学院上海应用物理研究所 | 含异质元素的聚碳硅烷及其制备方法 |
US20200308064A1 (en) * | 2019-04-01 | 2020-10-01 | BWXT Advanced Technologies LLC | Modified polymer derived ceramics for additive manufacturing, additive manufacturing using same, and ceramic bodies manufactured thereby |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441066A (en) * | 1945-07-23 | 1948-05-04 | Du Pont | Process for obtaining polymeric silicon compounds |
US2483972A (en) * | 1947-07-01 | 1949-10-04 | Dow Corning | Polysilmethylene and its production |
US2554193A (en) * | 1948-12-15 | 1951-05-22 | Dow Corning | Organopolysilanes |
US2557782A (en) * | 1949-02-23 | 1951-06-19 | Dow Corning | Method for making chlorosilphenanes and products |
US2563004A (en) * | 1949-06-15 | 1951-08-07 | Dow Corning | Organosilicon materials containing the repeating structure-sisic- |
US3070582A (en) * | 1959-03-23 | 1962-12-25 | Shell Oil Co | Polyaddition products of phosphines with unsaturated silanes |
GB996258A (en) * | 1961-02-16 | 1965-06-23 | Mini Of Aviat London | Improvements in or relating to organosilicon compounds |
US3159668A (en) * | 1961-04-14 | 1964-12-01 | Gen Electric | Polymeric organic silicon compound |
NL287353A (it) | 1962-01-02 | 1900-01-01 | ||
US3178392A (en) * | 1962-04-09 | 1965-04-13 | Rohm & Haas | Heterocyclic and linear siliconmethylene and polysiloxane compounds containing siliconmethylene units and their preparation |
US3278461A (en) * | 1963-08-01 | 1966-10-11 | Gen Electric | Silicon-silicon polymers |
DE1251035B (de) | 1963-10-16 | 1967-09-28 | Farbenfabriken Bayer Aktienge Seilschaft Leverkusen | Verfahren zur Herstellung von polymeren organischen Silicium-Bor-Stickstoff-Verbmdungen |
GB1023797A (en) * | 1964-02-14 | 1966-03-23 | Ici Ltd | New and improved process of preparing organosilicon polymers |
DE1226310B (de) * | 1965-04-06 | 1966-10-06 | Inst Neftechimicheskogo Sintez | Verfahren zur Herstellung von elastomeren Silylmethylenpolymeren |
US3422039A (en) * | 1965-06-16 | 1969-01-14 | Inst Neftechimicheskogo Sintez | Method for producing silylmethylene polymer(elastomer) |
US3398178A (en) * | 1965-06-21 | 1968-08-20 | Dow Corning | Polymerization of silacyclobutanes |
US3415728A (en) * | 1967-03-17 | 1968-12-10 | Gen Electric | Photopolymerization of cyclotrisiloxanes |
US3527781A (en) * | 1967-09-01 | 1970-09-08 | Dow Corning | Disilacyclobutanes |
GB1278355A (en) | 1968-12-23 | 1972-06-21 | Ventron Corp | Reaction products of certain metal/borate ester complexes and chlorosilanes |
US3702317A (en) * | 1970-11-18 | 1972-11-07 | Us Air Force | Method of making arylene modified siloxazanes incorporating cyclodisilazane structures |
DE2218960A1 (de) | 1972-04-19 | 1973-11-08 | Bayer Ag | Formkoerper aus mogenen mischungen von siliciumcarbid und siliciumnitrid und verfahren zu ihrer erstellung |
DE2236078A1 (de) * | 1972-07-22 | 1974-03-21 | Bayer Ag | Formkoerper aus siliciumcarbid und verfahren zu ihrer herstellung |
DE2243527A1 (de) | 1972-09-05 | 1974-04-18 | Bayer Ag | Formkoerper aus homogenen mischungen von siliciumcarbid und siliciumnitrid und verfahren zu ihrer herstellung |
-
1976
- 1976-02-28 JP JP2136576A patent/JPS52112700A/ja active Granted
-
1977
- 1977-02-18 US US05/770,138 patent/US4159259A/en not_active Expired - Lifetime
- 1977-02-23 CA CA272,446A patent/CA1102483A/en not_active Expired
- 1977-02-23 GB GB7600/77A patent/GB1579982A/en not_active Expired
- 1977-02-25 FR FR7705651A patent/FR2345477A1/fr active Granted
- 1977-02-25 SE SE7702090A patent/SE432260B/xx not_active IP Right Cessation
- 1977-02-25 IT IT48214/77A patent/IT1079485B/it active
- 1977-02-25 SU SU772456703A patent/SU776565A3/ru active
- 1977-02-28 DE DE2760031A patent/DE2760031C2/de not_active Expired - Lifetime
- 1977-02-28 DE DE19772708635 patent/DE2708635A1/de active Granted
-
1982
- 1982-03-16 SE SE8201643A patent/SE457263B/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE2708635C2 (it) | 1989-03-02 |
GB1579982A (en) | 1980-11-26 |
JPS52112700A (en) | 1977-09-21 |
SE7702090L (sv) | 1977-08-29 |
JPS616088B2 (it) | 1986-02-24 |
SE432260B (sv) | 1984-03-26 |
SE8201643L (sv) | 1982-03-16 |
FR2345477B1 (it) | 1982-04-02 |
SU776565A3 (ru) | 1980-10-30 |
US4159259A (en) | 1979-06-26 |
DE2760031C2 (it) | 1990-05-17 |
FR2345477A1 (fr) | 1977-10-21 |
DE2708635A1 (de) | 1977-09-01 |
SE457263B (sv) | 1988-12-12 |
CA1102483A (en) | 1981-06-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19940131 |