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US4047803A
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Nematic liquid crystal compositions
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1976-07-08
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Granted: 1977-09-13
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Expires: 1996-07-08
Abstract
Abstract When a 4,4'-substituted benzylideneaniline compound having specific substituents is compounded in a nematic liquid crystal material, a liquid crystal composition having a positive dielectric anisotropy and a broad mesomorphic range extending above and below room temperature can be obtained. An electro-optical element comprising a thin layer of this liquid crystal composition filled and supported between two substrates can be used for light modulation and display.
Inventors
- 👤 Masachika Yaguchi
- 👤 Toshio Jinnai
- 👤 Mikio Shirotsuka
- 👤 Kazuo Totani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:06
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A nematic liquid crystal material having positive dielectric anisotropy consisting of a compound represented by the formula ##STR52## wherein R is n-alkyl group of 7 to 15 carbon atoms.
Claim 2
Dependent Claim
29 words
A nematic liquid crystal material having positive dielectric anisotropy consisting of a compound represented by the formula ##STR52## wherein R is n-alkyl group of 7 to 15 carbon atoms.
Claim 3
Dependent Claim
48 words
An electro-optical element comprising a pair of electro plates including a thin layer of a nematic liquid crystal material having positive dielectric anisotropy, said nematic liquid crystal material consisting of a compound represented by the formula ##STR53## wherein R is n-alkyl group of 7 to 15 carbon atoms.
Claim 4
Dependent Claim
48 words
An electro-optical element comprising a pair of electro plates including a thin layer of a nematic liquid crystal material having positive dielectric anisotropy, said nematic liquid crystal material consisting of a compound represented by the formula ##STR53## wherein R is n-alkyl group of 7 to 15 carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |