NL176172B - Werkwijze voor het bereiden van mengsels met nematische eigenschappen en het bereiden van daarvoor geschikte pyrimidine-verbindingen. - Google Patents
Werkwijze voor het bereiden van mengsels met nematische eigenschappen en het bereiden van daarvoor geschikte pyrimidine-verbindingen.Info
- Publication number
- NL176172B NL176172B NLAANVRAGE7512497,A NL7512497A NL176172B NL 176172 B NL176172 B NL 176172B NL 7512497 A NL7512497 A NL 7512497A NL 176172 B NL176172 B NL 176172B
- Authority
- NL
- Netherlands
- Prior art keywords
- preparing
- pyrimidine compounds
- mixtures
- suitable pyrimidine
- nematic properties
- Prior art date
Links
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical class C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 title 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
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
- C07C45/511—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition involving transformation of singly bound oxygen functional groups to >C = O groups
- C07C45/515—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition involving transformation of singly bound oxygen functional groups to >C = O groups the singly bound functional group being an acetalised, ketalised hemi-acetalised, or hemi-ketalised hydroxyl group
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/02—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
- C07C47/12—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen containing more than one —CHO group
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/20—Unsaturated compounds having —CHO groups bound to acyclic carbon atoms
- C07C47/277—Unsaturated compounds having —CHO groups bound to acyclic carbon atoms containing ether groups, groups, groups, or groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
- C07C51/38—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups by decarboxylation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/26—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
- C07D239/30—Halogen atoms or nitro radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
- C07D239/32—One oxygen, sulfur or nitrogen atom
- C07D239/34—One oxygen atom
- C07D239/36—One oxygen atom as doubly bound oxygen atom or as unsubstituted hydroxy radical
-
- 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
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
- C09K19/345—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms
- C09K19/3458—Uncondensed pyrimidines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Liquid Crystal Substances (AREA)
- Liquid Crystal (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1431374A CH617452A5 (nl) | 1974-10-25 | 1974-10-25 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NL7512497A NL7512497A (nl) | 1976-04-27 |
| NL176172B true NL176172B (nl) | 1984-10-01 |
| NL176172C NL176172C (nl) | 1985-03-01 |
Family
ID=4399774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NLAANVRAGE7512497,A NL176172C (nl) | 1974-10-25 | 1975-10-24 | Werkwijze voor het bereiden van mengsels met nematische eigenschappen en het bereiden van daarvoor geschikte pyrimidine-verbindingen. |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US3997536A (nl) |
| JP (3) | JPS5180870A (nl) |
| AT (1) | AT349475B (nl) |
| AU (1) | AU476921B2 (nl) |
| BE (1) | BE834837A (nl) |
| CA (1) | CA1042889A (nl) |
| CH (1) | CH617452A5 (nl) |
| DD (2) | DD124731A5 (nl) |
| DE (1) | DE2547737C2 (nl) |
| DK (2) | DK479675A (nl) |
| ES (1) | ES442044A1 (nl) |
| FR (1) | FR2309543A1 (nl) |
| GB (1) | GB1473990A (nl) |
| HK (1) | HK7278A (nl) |
| IT (1) | IT1043486B (nl) |
| NL (1) | NL176172C (nl) |
| SE (1) | SE417962B (nl) |
| ZA (1) | ZA756410B (nl) |
Families Citing this family (56)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062798A (en) * | 1975-09-19 | 1977-12-13 | Hoffmann-La Roche Inc. | Phenylpyrimidine derivatives |
| NL7701750A (nl) * | 1976-02-26 | 1977-08-30 | Hoffmann La Roche | Mengsels van vloeibare kristallen. |
| US4052396A (en) * | 1976-11-22 | 1977-10-04 | Ciba-Geigy Corporation | Process for the production of 2-alkyl or 2-cycloalkyl-4-methyl-6-hydroxypyrimidines |
| US4052397A (en) * | 1976-11-22 | 1977-10-04 | Ciba-Geigy Corporation | Process for the production of 2-alkyl or 2-cycloalkyl-4-methyl-6-hydroxypyrimidines |
| JPS5411887A (en) * | 1977-06-29 | 1979-01-29 | Sharp Corp | Liquid crystal composition |
| DD138558A1 (de) * | 1977-12-08 | 1979-11-07 | Frank Kuschel | Nematische fluessig-kristalline gemische |
| JPS5483694A (en) * | 1977-12-16 | 1979-07-03 | Hitachi Ltd | Nematic liquid crystal body for display device |
| JPS5941983B2 (ja) * | 1978-02-17 | 1984-10-11 | 大日本インキ化学工業株式会社 | トランス（エカトリアル↓−エカトリアル）１，４↓−ジ置換シクロヘキサン誘導体 |
| US4309539A (en) * | 1978-03-13 | 1982-01-05 | Hoffmann-La Roche Inc. | Pyrimidine derivatives |
| US4163848A (en) * | 1978-08-08 | 1979-08-07 | Ciba-Geigy Corporation | Process for the production of 2-alkyl- or cycloalkyl-4-methyl-6-hydroxypyrimidines |
| JPS5534206A (en) * | 1978-08-30 | 1980-03-10 | Hitachi Ltd | Nematic liquid crystal for display unit |
| DE2944905A1 (de) * | 1978-12-13 | 1980-10-23 | Werk Fernsehelektronik Veb | Kristallin-fluessige substituierte 1,3-dioxane und diese enthaltende gemische |
| CA1120478A (en) * | 1979-02-05 | 1982-03-23 | Arthur Boller | Cyclohexyl pyrimidines |
| DE3014912A1 (de) * | 1979-05-15 | 1980-11-27 | Werk Fernsehelektronik Veb | Nematische fluessigkristalline 5-cyan- 2- eckige klammer auf 4-acyloxyphenyl eckige klammer zu -pyrimidine und diese enthaltende gemische |
| DE3063497D1 (en) * | 1979-08-20 | 1983-07-07 | Werk Fernsehelektronik Veb | Nematic crystalline-liquid 5-alkyl-2-(4-acyloxyphenyl)-pyrimidines for opto-electronic arrangements and process for their preparation |
| US4364838A (en) * | 1979-11-14 | 1982-12-21 | Hoffmann-La Roche Inc. | Liquid crystal mixtures |
| CH652400A5 (en) * | 1979-11-14 | 1985-11-15 | Hoffmann La Roche | Phenyldioxanes, and liquid-crystalline mixtures containing them |
| DE2951099A1 (de) * | 1979-12-19 | 1981-06-25 | Merck Patent Gmbh, 6100 Darmstadt | Tetrahydrochinazoline, verfahren zu ihrer herstellung, diese enthaltende fluessigkristalline dielektrika und elektrooptisches anzeigeelement |
| JPS56113768A (en) * | 1980-02-15 | 1981-09-07 | Seiko Epson Corp | Compound |
| JPS56116774A (en) * | 1980-02-19 | 1981-09-12 | Seiko Epson Corp | Nematic liquid crystal composition |
| US4335011A (en) * | 1980-03-28 | 1982-06-15 | Timex Corporation | Cyclohexyl-dioxane liquid crystalline compounds |
| US4335012A (en) * | 1980-04-03 | 1982-06-15 | Timex Corporation | 5-Substituted-2-(4-cyanophenyl)-1,3-dioxanes |
| DE3023989A1 (de) * | 1980-06-26 | 1982-01-21 | Merck Patent Gmbh, 6100 Darmstadt | Fluessigkristallines dielektrikum |
| CH645102A5 (de) * | 1980-10-14 | 1984-09-14 | Hoffmann La Roche | Disubstituierte pyrimidine. |
| JPS5790082A (en) * | 1980-11-26 | 1982-06-04 | Seiko Epson Corp | Liquid crystal composition |
| JPS57117583A (en) * | 1981-01-12 | 1982-07-22 | Seiko Epson Corp | Liquid crystal composition |
| US4452718A (en) * | 1981-07-31 | 1984-06-05 | Hoffmann-La Roche Inc. | Pyridazines |
| CH651025A5 (de) * | 1982-05-14 | 1985-08-30 | Hoffmann La Roche | Pyridazine und ihre verwendung als komponenten fluessigkristalliner gemische. |
| US4528114A (en) * | 1981-12-18 | 1985-07-09 | Hoffmann-La Roche Inc. | Acetylenes |
| US5227484A (en) * | 1982-01-14 | 1993-07-13 | Merck Patent Gmbh | Anisotropic compounds having nematic phase and liquid crystal mixtures |
| JPS58128356A (ja) * | 1982-01-28 | 1983-07-30 | Ube Ind Ltd | ２−アルコキシメチレン−３，３−ジアルコキシブロパンニトリル類 |
| GB2120242A (en) * | 1982-04-30 | 1983-11-30 | Erba Farmitalia | Ergoline derivatives |
| JPS5939876A (ja) * | 1982-08-26 | 1984-03-05 | Chisso Corp | ピリミジン誘導体 |
| DE3368618D1 (en) * | 1982-11-04 | 1987-02-05 | Ici Plc | Process for the extraction of metal values and novel metal extractants |
| DE3465192D1 (en) * | 1983-03-16 | 1987-09-10 | Hoffmann La Roche | Liquid crystal components having an alkenyl chain |
| US4581155A (en) * | 1983-03-31 | 1986-04-08 | Chisso Corporation | Halogenopyrimidine derivatives |
| DE3315295A1 (de) * | 1983-04-27 | 1984-10-31 | Merck Patent Gmbh, 6100 Darmstadt | Fluorhaltige pyrimidinderivate |
| DE3481055D1 (de) * | 1983-08-22 | 1990-02-22 | Chisso Corp | 2,3-dicyan-5-substituierte pyrazine und diese enthaltende fluessigkristall-zusammensetzung. |
| JPS60146877A (ja) * | 1984-01-11 | 1985-08-02 | Chisso Corp | ２―置換―６―（５―置換―２―ピリミジニル）ナフタリン |
| US4609485A (en) * | 1984-02-17 | 1986-09-02 | Chisso Corporation | Bipyrimidinyl derivatives |
| DE3411571A1 (de) * | 1984-03-29 | 1985-10-10 | Merck Patent Gmbh, 6100 Darmstadt | Pyrimidine |
| DE3561395D1 (de) * | 1984-05-25 | 1988-02-18 | Hoffmann La Roche | Phenylisothiocyanates |
| JPS61215372A (ja) * | 1985-03-20 | 1986-09-25 | Teikoku Chem Ind Corp Ltd | 液晶化合物 |
| EP0191860B1 (en) * | 1984-06-07 | 1990-04-18 | Seiko Instruments Inc. | Liquid crystal compound |
| JPS61152659A (ja) * | 1984-12-27 | 1986-07-11 | Chisso Corp | １，４−ジピリミジニルベンゼン誘導体 |
| DE3500909A1 (de) * | 1985-01-12 | 1986-07-17 | Merck Patent Gmbh, 6100 Darmstadt | Pyrimidine |
| JPS61180775A (ja) * | 1985-01-22 | 1986-08-13 | メルク・パテント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | ジヒドロアジン液晶化合物 |
| JPS61197563A (ja) * | 1985-02-27 | 1986-09-01 | Chisso Corp | トリフルオロメチルフエニル基をもつピリミジン誘導体 |
| JPS61233689A (ja) * | 1985-03-22 | 1986-10-17 | メルク・パテント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | 複素環式ホウ素化合物 |
| DE3667170D1 (de) * | 1985-03-26 | 1990-01-04 | Hoffmann La Roche | Alkenylsubstituierte phenylisothiocyanate und benzonitrile. |
| US4980082A (en) * | 1986-09-02 | 1990-12-25 | Seiko Instruments Inc. | Ferroelectric SmC liquid crystal composition which comprises pyrimidinylphenyl ester compounds |
| CA1341098C (en) * | 1988-08-25 | 2000-09-12 | Kazuhiko Sakaguchi | Liquid crystal composition and use thereof |
| DE3928267A1 (de) * | 1989-08-26 | 1991-02-28 | Merck Patent Gmbh | 5-oxy-2-phenylpyrimidine und fluessigkristallines medium |
| JPH07278545A (ja) * | 1994-04-14 | 1995-10-24 | Chisso Corp | ネマテック液晶組成物 |
| CN103965111A (zh) * | 2014-05-05 | 2014-08-06 | 淮海工学院 | 一种含有水杨醛席夫碱的双子季铵盐及其制备方法 |
| JP6513178B2 (ja) * | 2014-07-08 | 2019-05-15 | ダウ アグロサイエンシィズ エルエルシー | ４−アルコキシ−３−ヒドロキシピコリン酸の製造方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH593495A5 (nl) * | 1971-12-22 | 1977-12-15 | Werk Fernsehelektronik Veb | |
| DD107563A1 (nl) * | 1973-09-27 | 1974-08-05 |
-
1974
- 1974-10-25 CH CH1431374A patent/CH617452A5/de not_active IP Right Cessation
-
1975
- 1975-10-09 ZA ZA00756410A patent/ZA756410B/xx unknown
- 1975-10-13 AU AU85670/75A patent/AU476921B2/en not_active Expired
- 1975-10-20 IT IT28443/75A patent/IT1043486B/it active
- 1975-10-21 US US05/624,354 patent/US3997536A/en not_active Expired - Lifetime
- 1975-10-23 FR FR7532424A patent/FR2309543A1/fr active Granted
- 1975-10-23 SE SE7511902A patent/SE417962B/xx unknown
- 1975-10-23 DD DD189021A patent/DD124731A5/xx unknown
- 1975-10-23 DD DD7500198028A patent/DD128698A5/xx unknown
- 1975-10-24 CA CA238,291A patent/CA1042889A/en not_active Expired
- 1975-10-24 AT AT814575A patent/AT349475B/de not_active IP Right Cessation
- 1975-10-24 GB GB4382275A patent/GB1473990A/en not_active Expired
- 1975-10-24 ES ES442044A patent/ES442044A1/es not_active Expired
- 1975-10-24 DK DK479675A patent/DK479675A/da not_active Application Discontinuation
- 1975-10-24 NL NLAANVRAGE7512497,A patent/NL176172C/nl not_active IP Right Cessation
- 1975-10-24 DE DE2547737A patent/DE2547737C2/de not_active Expired
- 1975-10-24 BE BE161221A patent/BE834837A/xx unknown
- 1975-10-24 JP JP50127576A patent/JPS5180870A/ja active Granted
-
1977
- 1977-08-29 DK DK382677A patent/DK382677A/da not_active Application Discontinuation
-
1978
- 1978-02-10 HK HK72/78A patent/HK7278A/xx unknown
- 1978-02-24 JP JP1997778A patent/JPS53101385A/ja active Pending
- 1978-02-24 JP JP1997678A patent/JPS53114788A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53101385A (en) | 1978-09-04 |
| FR2309543B1 (nl) | 1978-04-07 |
| DK479675A (da) | 1976-04-26 |
| NL176172C (nl) | 1985-03-01 |
| FR2309543A1 (fr) | 1976-11-26 |
| ZA756410B (en) | 1976-09-29 |
| DD128698A5 (de) | 1977-12-07 |
| DE2547737A1 (de) | 1976-04-29 |
| NL7512497A (nl) | 1976-04-27 |
| AT349475B (de) | 1979-04-10 |
| JPS556631B2 (nl) | 1980-02-18 |
| HK7278A (en) | 1978-02-17 |
| JPS5180870A (en) | 1976-07-15 |
| DD124731A5 (nl) | 1977-03-09 |
| BE834837A (fr) | 1976-04-26 |
| US3997536A (en) | 1976-12-14 |
| DE2547737C2 (de) | 1982-09-16 |
| AU8567075A (en) | 1976-10-07 |
| SE417962B (sv) | 1981-04-27 |
| CA1042889A (en) | 1978-11-21 |
| ES442044A1 (es) | 1977-06-16 |
| GB1473990A (en) | 1977-05-18 |
| IT1043486B (it) | 1980-02-20 |
| ATA814575A (de) | 1978-09-15 |
| SE7511902L (sv) | 1976-04-26 |
| JPS53114788A (en) | 1978-10-06 |
| DK382677A (da) | 1977-08-29 |
| AU476921B2 (en) | 1976-10-07 |
| CH617452A5 (nl) | 1980-05-30 |
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