US4676925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystalline biphenyl derivatives and mixtures thereof
Assignee: JNC Corp
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Filing: 1986-04-21
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Granted: 1987-06-30
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Expires: 2006-04-21
Abstract
Abstract Chiral smectic compounds having a high response rate and being superior as a ferroelectric liquid crystalline material, and chiral smectic mixtures containing the same are provided, which compounds being expressed by the formula ##STR1## wherein X represents --CH 2 --, --O-- or --CO--; n represents 0, 1 or 2; when X represents --CH 2 --, Y represents R--, R--CO--, ROCO--, ##STR2## wherein R represents an alkyl group having 1 to 18 carbon atoms, and when X represents --O-- or --CO--, Y represents R; and * represents a symbol indicating an optically active carbon atom.
Inventors
- 👤 Hiromichi Inoue
- 👤 Shinichi Saito
- 👤 Kanetsugu Terashima
- 👤 Takashi Inukai
- 👤 Kenji Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:17
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/205; C07C43/2055; C07C45/00; C07C45/004; C07C49/00; C07C49/76; C07C49/84; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
Liquid crystalline compounds expressed by the formula ##STR25## wherein l is 0 or 1, and n is 1, R represents an alkyl group having 5 to 10 carbon atoms when l is 0 and 4 to 13 carbon atoms when l is 1, * indicates an optically active carbon compound.
Claim 2
Dependent Claim
50 words
Liquid crystalline compounds expressed by the formula ##STR25## wherein l is 0 or 1, and n is 1, R represents an alkyl group having 5 to 10 carbon atoms when l is 0 and 4 to 13 carbon atoms when l is 1, * indicates an optically active carbon compound.
Claim 3
Dependent Claim
10 words
A compound according to claim 1 wherein l is 0.
Claim 4
Dependent Claim
10 words
A compound according to claim 1 wherein l is 1.
Claim 5
Dependent Claim
25 words
A chiral smectic liquid crystalline composition comprising at least two components, one of which is a compound having the formula set forth in claim 1.
Claim 6
Dependent Claim
25 words
A chiral smectic liquid crystalline composition comprising at least two components, one of which is a compound having the formula set forth in claim 2.
Claim 7
Dependent Claim
25 words
A chiral smectic liquid crystalline composition comprising at least two components, one of which is a compound having the formula set forth in claim 3.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |