GB1507207A - Polyesters derived from dihydric phenols which form anisotropic melts - Google Patents

Polyesters derived from dihydric phenols which form anisotropic melts

Info

Publication number
GB1507207A
GB1507207A GB19698/75A GB1969875A GB1507207A GB 1507207 A GB1507207 A GB 1507207A GB 19698/75 A GB19698/75 A GB 19698/75A GB 1969875 A GB1969875 A GB 1969875A GB 1507207 A GB1507207 A GB 1507207A
Authority
GB
United Kingdom
Prior art keywords
dihydric phenols
polyesters derived
form anisotropic
anisotropic melts
melts
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.)
Expired
Application number
GB19698/75A
Other languages
English (en)
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27413081&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB1507207(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1507207A publication Critical patent/GB1507207A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/19—Hydroxy compounds containing aromatic rings
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/66—Polyesters containing oxygen in the form of ether groups
    • C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/672—Dicarboxylic acids and dihydroxy 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
    • C08G63/682—Polyesters containing atoms other than carbon, hydrogen and oxygen containing halogens
    • C08G63/6824—Polyesters containing atoms other than carbon, hydrogen and oxygen containing halogens derived from polycarboxylic acids and polyhydroxy compounds
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
GB19698/75A 1974-05-10 1975-05-09 Polyesters derived from dihydric phenols which form anisotropic melts Expired GB1507207A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US46869574A 1974-05-10 1974-05-10
US46869774A 1974-05-10 1974-05-10
US46869074A 1974-05-10 1974-05-10

Publications (1)

Publication Number Publication Date
GB1507207A true GB1507207A (en) 1978-04-12

Family

ID=27413081

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19698/75A Expired GB1507207A (en) 1974-05-10 1975-05-09 Polyesters derived from dihydric phenols which form anisotropic melts

Country Status (16)

Country Link
JP (2) JPS5520008B2 (es)
AR (2) AR217038A1 (es)
AU (2) AU499272B2 (es)
BR (2) BR7502886A (es)
CH (2) CH580653A5 (es)
DE (2) DE2520820C3 (es)
ES (2) ES437549A1 (es)
FR (2) FR2270074B1 (es)
GB (1) GB1507207A (es)
IE (2) IE43263B1 (es)
IN (1) IN144854B (es)
IT (2) IT1037986B (es)
LU (2) LU72430A1 (es)
NL (2) NL162976B (es)
SE (2) SE416814B (es)
SU (1) SU1299519A3 (es)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030417A1 (en) * 1979-11-30 1981-06-17 Imperial Chemical Industries Plc Compositions of melt-processable polymers having improved processibility, and method of processing
US4311824A (en) 1978-10-05 1982-01-19 Rhone-Poulenc Industries Thermotropic alkylaromatic copolyesters
US4352927A (en) 1978-05-26 1982-10-05 Imperial Chemical Industries Limited Method of improving processability of rigid polymers
US4398019A (en) 1980-11-07 1983-08-09 Imperial Chemical Industries Plc Anisotropic melt forming polyesters and polyesteramides
US4508891A (en) * 1980-07-16 1985-04-02 Imperial Chemical Industries, Plc Shaped articles formed from polymers capable of exhibiting anisotropic melts
US4727131A (en) * 1985-12-04 1988-02-23 Basf Aktiengesellschaft Wholly aromatic mesomorphic polyester amides and the preparation thereof
US4728715A (en) * 1985-12-04 1988-03-01 Basf Aktiengesellschaft Wholly aromatic polyesters and preparation thereof
US4743416A (en) * 1984-12-10 1988-05-10 Sumitomo Chemical Company, Limited Melt spinning process of aromatic polyester
US4749770A (en) * 1986-07-02 1988-06-07 Basf Aktiengesellschaft Wholly aromatic mesomorphic polyesters and their preparation
US4764582A (en) * 1986-08-28 1988-08-16 Basf Aktiengesellschaft Wholly aromatic thermotropic polyesters
US4778927A (en) * 1985-12-04 1988-10-18 Basf Aktiengesellschaft Wholly aromatic mesomorphic polyesters and the preparation thereof
US4802061A (en) * 1986-07-25 1989-01-31 Basf Aktiengesellschaft Microelectronic components and thick-film hybrid circuits
US4831103A (en) * 1985-12-04 1989-05-16 Basf Aktiengesellschaft Wholly aromatic liquid-crystalline polycondensates
US4837268A (en) * 1986-12-29 1989-06-06 Kuraray Company, Ltd. Wholly aromatic polyester
US4865790A (en) * 1985-04-02 1989-09-12 Sumitomo Chemical Company, Limited Process for producing aromatic polyester fiber
US4871501A (en) * 1984-11-09 1989-10-03 Sumitomo Chemical Company Process for melt spinning aromatic polyester
US4999416A (en) * 1989-01-25 1991-03-12 Nippon Oil Company, Limited Wholly aromatic polyesters
US5013819A (en) * 1987-12-10 1991-05-07 Montedison S.P.A. Liquid-crystalline, thermotropic aromatic polyesters

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE416814B (sv) * 1974-05-10 1981-02-09 Du Pont Nya syntetiska polyestrar och sett for deras framstellning
US4159365A (en) 1976-11-19 1979-06-26 E. I. Du Pont De Nemours And Company Polyphenyl-1,4-phenylene terephthalates and fibers therefrom
US4146702A (en) * 1977-08-08 1979-03-27 Eastman Kodak Company Liquid crystal copolyesters prepared from an aromatic dicarboxylic acid, a substituted hydroquinone and a m-acyloxybenzoic acid
US4169933A (en) * 1977-08-08 1979-10-02 Eastman Kodak Company Liquid crystal copolyesters containing terephthalic acid and 2,6-naphthalenedicarboxylic acid
DE2965268D1 (en) * 1978-05-04 1983-06-01 Eastman Kodak Co Polyesters of 4-carboxybenzenepropionic acid
US4153779A (en) * 1978-06-26 1979-05-08 Eastman Kodak Company Liquid crystal copolyester containing a substituted phenylhydroquinone
EP0007732A1 (en) * 1978-07-31 1980-02-06 Imperial Chemical Industries Plc Shaped articles of intractable polymers
US4238599A (en) * 1979-02-08 1980-12-09 Fiber Industries, Inc. Polyester of para-hydroxy benzoic acid, 1,2-bis(para-carboxy phenoxy)ethane, terephthalic acid and substituted hydroquinone capable of forming an anisotropic melt which readily undergoes melt processing
US4269965A (en) * 1979-09-17 1981-05-26 E. I. Du Pont De Nemours And Company Aromatic polyester which forms optically anisotropic melts and filaments thereof
JPS5761493U (es) * 1980-09-30 1982-04-12
US4318842A (en) * 1980-10-06 1982-03-09 Celanese Corporation Polyester of 6-hydroxy-2-naphthoic acid, aromatic diol, and 1,4-cyclohexanedicarboxylic acid capable of undergoing melt processing
JPS57164120A (en) * 1981-04-02 1982-10-08 Kanegafuchi Chem Ind Co Ltd Heat-resistant aromatic polyester copolymer and its production
JPS5891816A (ja) * 1981-11-26 1983-05-31 Asahi Chem Ind Co Ltd ポリエステル繊維の製造方法
JPS5941331A (ja) * 1982-09-01 1984-03-07 Agency Of Ind Science & Technol 含ハロゲン芳香族ポリエステル
JPS59163425A (ja) * 1983-03-07 1984-09-14 Teijin Ltd 合成繊維の表面改質法
JPS6052623A (ja) * 1983-08-26 1985-03-25 Teijin Ltd 熱溶融性繊維の表面処理方法
JPS6017112A (ja) * 1983-07-07 1985-01-29 Teijin Ltd 芳香族ポリアミド繊維の製造方法
US4818812A (en) * 1983-08-22 1989-04-04 International Business Machines Corporation Sealant for integrated circuit modules, polyester suitable therefor and preparation of polyester
JPS60192725A (ja) * 1984-03-09 1985-10-01 Agency Of Ind Science & Technol 芳香族コポリエステル
JPS60192724A (ja) * 1984-03-09 1985-10-01 Agency Of Ind Science & Technol 高弾性率ポリエステル
US6045906A (en) 1984-03-15 2000-04-04 Cytec Technology Corp. Continuous, linearly intermixed fiber tows and composite molded article thereform
DE3505142A1 (de) * 1985-02-14 1986-08-14 Bayer Ag, 5090 Leverkusen Blockcopolymere aus substituierten/unsubstituierten poly(oxy-1,4-phenylen)- und fluessig-kristallinen segmenten
US4668454A (en) * 1985-06-12 1987-05-26 E. I. Du Pont De Nemours And Company Heat-strengthening process
JP2565676B2 (ja) * 1985-08-23 1996-12-18 住友化学工業株式会社 芳香族ポリエステル繊維の製造法
JPH06104930B2 (ja) * 1985-09-21 1994-12-21 住友化学工業株式会社 芳香族ポリエステル繊維の製造法
DE3609805A1 (de) 1986-03-22 1987-09-24 Basf Ag Verfahren zur herstellung von formkoerpern aus fluessig-kristallinen polymeren
FR2607818B1 (fr) * 1986-12-05 1989-03-24 Rhone Poulenc Chimie Copolyesters amides aromatiques thermotropes
FR2617851B1 (fr) * 1987-07-10 1989-11-24 Rhone Poulenc Chimie Copolyesters et copolyesteramides aromatiques thermotropes
DE20008542U1 (de) 2000-05-12 2000-09-21 Trw Repa Gmbh Gassack
JP2002060494A (ja) * 2000-08-11 2002-02-26 Sumitomo Chem Co Ltd 熱可塑性樹脂の製造方法

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB863704A (es) * 1956-05-18 1900-01-01
FR1175382A (fr) * 1957-05-16 1959-03-24 Snecma Dispositif combiné formant pompe et dégazeur
US3160603A (en) * 1960-06-01 1964-12-08 Gen Electric Wholly aromatic poly-p-phenylene chloroisophthalates
US3036990A (en) * 1960-06-01 1962-05-29 Gen Electric Wholly aromatic polyesters from hydroquinone, isophthalic and terephthalic acid reactants
NL129038C (nl) * 1960-06-01 1970-01-15 Gen Electric Werkwijze ter bereiding van lineaire polyesters
US3160604A (en) * 1961-06-01 1964-12-08 Mbltino fo
US3151804A (en) * 1961-06-29 1964-10-06 Gen Motors Corp Vacuum operated pump
US3216187A (en) * 1962-01-02 1965-11-09 Du Pont High strength polyethylene terephthalate yarn
GB989552A (en) * 1962-02-19 1965-04-22 Ici Ltd Crystalline polyesters
GB993272A (en) * 1962-05-22 1965-05-26 Ici Ltd Crystalline polyesters
NL296856A (es) * 1962-11-12
US3374202A (en) * 1964-10-05 1968-03-19 Du Pont Homopolymeric and copolymeric esters of durohydroquinone
US3671542A (en) * 1966-06-13 1972-06-20 Du Pont Optically anisotropic aromatic polyamide dopes
DE1795541C2 (de) * 1966-06-13 1982-06-03 E.I. du Pont de Nemours and Co., 19898 Wilmington, Del. Poly-(p-benzamid), Verfahren zu seiner Herstellung und seine Verwendung
FR1547346A (fr) * 1966-12-21 1968-11-22 Dynamit Nobel Ag Procédé de préparation de polyesters à partir de phénols halogénés bivalents
JPS5012006B1 (es) * 1968-06-12 1975-05-08
DE1924807A1 (de) * 1969-05-16 1970-11-19 Dynamit Nobel Ag Thermostabile Polyester
NL6919487A (es) * 1968-12-30 1970-07-02
DE1817384A1 (de) * 1968-12-30 1970-07-09 Dynamit Nobel Ag Thermostabile Polyester
IL39187A (en) * 1971-04-28 1976-02-29 Du Pont Polyamide fibers and films and their preparation
JPS4855288A (es) * 1971-11-11 1973-08-03
US3804805A (en) * 1972-12-01 1974-04-16 Eastman Kodak Co Copolyester prepared from polyethylene terephthalate and an acyloxy benzoic acid
JPS4964696A (es) * 1972-10-25 1974-06-22
JPS4971085A (es) * 1972-11-09 1974-07-09
US3975487A (en) * 1973-08-20 1976-08-17 The Carborundum Company Process for spinning high modulus oxybenzoyl copolyester fibers
SE416814B (sv) * 1974-05-10 1981-02-09 Du Pont Nya syntetiska polyestrar och sett for deras framstellning
US3991013A (en) * 1974-05-10 1976-11-09 E. I. Du Pont De Nemours And Company Copolyesters of derivatives of hydroquinone
US4083829A (en) * 1976-05-13 1978-04-11 Celanese Corporation Melt processable thermotropic wholly aromatic polyester
US4067852A (en) * 1976-05-13 1978-01-10 Celanese Corporation Melt processable thermotropic wholly aromatic polyester containing polybenzoyl units
US4156070A (en) * 1977-08-08 1979-05-22 Eastman Kodak Company Liquid crystal copolyesters prepared from an aromatic dicarboxylic acid, a substituted hydroquinone and resorcinol
US4169933A (en) * 1977-08-08 1979-10-02 Eastman Kodak Company Liquid crystal copolyesters containing terephthalic acid and 2,6-naphthalenedicarboxylic acid
US4130545A (en) * 1977-09-12 1978-12-19 Celanese Corporation Melt processable thermotropic wholly aromatic polyester comprising both para-oxybenzoyl and meta-oxybenzoyl moieties
US4140846A (en) * 1978-05-04 1979-02-20 Eastman Kodak Company Liquid crystal copolyesters containing 4-carboxybenzenepropionic acid

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352927A (en) 1978-05-26 1982-10-05 Imperial Chemical Industries Limited Method of improving processability of rigid polymers
US4447599A (en) * 1978-05-26 1984-05-08 Imperial Chemical Industries Plc Thermotropic liquid crystal shaped article
US4311824A (en) 1978-10-05 1982-01-19 Rhone-Poulenc Industries Thermotropic alkylaromatic copolyesters
US4386174A (en) 1979-11-30 1983-05-31 Imperial Chemical Industries Limited Compositions of melt-processable polymers having improved processability
US4433083A (en) * 1979-11-30 1984-02-21 Imperial Chemical Industries Plc Compositions of melt-processable polymers having improved processability
US4438236A (en) 1979-11-30 1984-03-20 Imperial Chemical Industries Plc Compositions of melt-processable polymers having improved processability
EP0030417A1 (en) * 1979-11-30 1981-06-17 Imperial Chemical Industries Plc Compositions of melt-processable polymers having improved processibility, and method of processing
US4508891A (en) * 1980-07-16 1985-04-02 Imperial Chemical Industries, Plc Shaped articles formed from polymers capable of exhibiting anisotropic melts
US4398019A (en) 1980-11-07 1983-08-09 Imperial Chemical Industries Plc Anisotropic melt forming polyesters and polyesteramides
US4871501A (en) * 1984-11-09 1989-10-03 Sumitomo Chemical Company Process for melt spinning aromatic polyester
US4743416A (en) * 1984-12-10 1988-05-10 Sumitomo Chemical Company, Limited Melt spinning process of aromatic polyester
US4865790A (en) * 1985-04-02 1989-09-12 Sumitomo Chemical Company, Limited Process for producing aromatic polyester fiber
US4728715A (en) * 1985-12-04 1988-03-01 Basf Aktiengesellschaft Wholly aromatic polyesters and preparation thereof
US4778927A (en) * 1985-12-04 1988-10-18 Basf Aktiengesellschaft Wholly aromatic mesomorphic polyesters and the preparation thereof
US4831103A (en) * 1985-12-04 1989-05-16 Basf Aktiengesellschaft Wholly aromatic liquid-crystalline polycondensates
US4727131A (en) * 1985-12-04 1988-02-23 Basf Aktiengesellschaft Wholly aromatic mesomorphic polyester amides and the preparation thereof
US4749770A (en) * 1986-07-02 1988-06-07 Basf Aktiengesellschaft Wholly aromatic mesomorphic polyesters and their preparation
US4802061A (en) * 1986-07-25 1989-01-31 Basf Aktiengesellschaft Microelectronic components and thick-film hybrid circuits
US4764582A (en) * 1986-08-28 1988-08-16 Basf Aktiengesellschaft Wholly aromatic thermotropic polyesters
US4837268A (en) * 1986-12-29 1989-06-06 Kuraray Company, Ltd. Wholly aromatic polyester
US5013819A (en) * 1987-12-10 1991-05-07 Montedison S.P.A. Liquid-crystalline, thermotropic aromatic polyesters
US4999416A (en) * 1989-01-25 1991-03-12 Nippon Oil Company, Limited Wholly aromatic polyesters

Also Published As

Publication number Publication date
IE43298L (en) 1975-11-10
IE43263B1 (en) 1981-01-28
DE2520820B2 (de) 1979-04-05
FR2270074A1 (es) 1975-12-05
AU8093475A (en) 1976-11-11
NL164069B (nl) 1980-06-16
IT1037986B (it) 1979-11-20
NL164069C (nl) 1980-11-17
SE416814B (sv) 1981-02-09
IT1037987B (it) 1979-11-20
JPS50157619A (es) 1975-12-19
DE2520819B2 (de) 1979-06-21
JPS5520008B2 (es) 1980-05-30
DE2520819A1 (de) 1975-11-27
SE7505189L (sv) 1975-11-11
NL162976B (nl) 1980-02-15
JPS55482B2 (es) 1980-01-08
DE2520820A1 (de) 1975-11-27
AU8093675A (en) 1976-11-11
DE2520819C3 (de) 1989-03-16
BR7502886A (pt) 1976-03-16
SE7504996L (sv) 1975-11-11
DE2520820C3 (de) 1993-09-30
JPS50158695A (es) 1975-12-22
CH580653A5 (es) 1976-10-15
FR2270074B1 (es) 1978-02-10
LU72430A1 (es) 1977-02-09
NL7505551A (nl) 1975-11-12
LU72429A1 (es) 1977-02-09
ES437549A1 (es) 1977-10-01
FR2270282A1 (es) 1975-12-05
ES437550A1 (es) 1977-04-01
SU1299519A3 (ru) 1987-03-23
AR207040A1 (es) 1976-09-09
SE409577B (sv) 1979-08-27
NL7505552A (es) 1975-11-12
FR2270282B1 (es) 1979-05-11
AU499272B2 (en) 1979-04-12
IE43263L (en) 1975-11-10
IN144854B (es) 1978-07-15
BR7502887A (pt) 1976-03-16
AR217038A1 (es) 1980-02-29
AU499234B2 (en) 1979-04-12
CH601390A5 (es) 1978-07-14
IE43298B1 (en) 1981-01-28

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Legal Events

Date Code Title Description
PS Patent sealed
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
SPA Amended specification published
PE20 Patent expired after termination of 20 years

Effective date: 19950508