US4589996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystalline carbonic acid esters and liquid crystal compositions containing the same
Assignee: JNC Corp
•
Filing: 1984-08-28
•
Granted: 1986-05-20
•
Expires: 2004-08-28
Abstract
Abstract A novel chiral liquid crystalline compound having an optically active group and a liquid crystal composition containing the same are provided, which compound is expressed by the general formula ##STR1## wherein R is a linear chain or branched alkyl group of 1˜18 C; l is 0 or 1; X is COO or --O-- in the case of l=0 and COO, --O-- or --CH 2 -- in the case of l=1; and * represents optically active carbon, and which compound, when used as a display element, brings about a higher response velocity.
Inventors
- 👤 Hiromichi Inoue
- 👤 Shinichi Saito
- 👤 Kanetsugu Terashima
- 👤 Takashi Inukai
- 👤 Kenji Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:42
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A carbonic acid ester expressed by the formula ##STR4## wherein R represents a linear chain or branched alkyl group of 1 to 18 carbon atoms; X represents COO, --O-- or --CH 2 ; and * represents optically active carbon.
Claim 2
Dependent Claim
39 words
A carbonic acid ester expressed by the formula ##STR4## wherein R represents a linear chain or branched alkyl group of 1 to 18 carbon atoms; X represents COO, --O-- or --CH 2 ; and * represents optically active carbon.
Claim 3
Dependent Claim
35 words
A chiral smectic liquid crystalline composition comprising at least two components, one of which is a carbonic acid ester as set forth in claim 1 and another of which is a smectic C liquid crystal.
Claim 4
Dependent Claim
21 words
A chiral smectic liquid crystal composition consisting only of a plurality of the carbonic acid esters set forth in claim 1.
Claim 5
Dependent Claim
56 words
A chiral smectic liquid crystal composition consisting of at least one carbonic acid ester as set forth in claim 1 and at least one compound having the formula ##STR5## wherein R represents a linear chain or branched alkyl group of 1 to 18 carbon atoms; X represents COO or --O--; and * represents optically active carbon.
Claim 6
Dependent Claim
18 words
A light switching element that includes a chiral smectic liquid crystal composition as set forth in claim 2.
Claim 7
Dependent Claim
18 words
A light switching element that includes a chiral smectic liquid crystal composition as set forth in claim 3.
Claim 8
Dependent Claim
18 words
A light switching element that includes a chiral smectic liquid crystal composition as set forth in claim 4.
References Cited (Backward Citations)
US31715A
Cited
US4065489A
Cited
US4257911A
Cited
US4149413A
Cited
JPS5388677A
Cited
USRE31715E
Cited
US4195916A
Cited
US4264148A
Cited
US4405209A
Cited
JPS5829877A
Cited
JPS57135883A
Cited
EP0110299A2
Cited
EP0115693A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |