US5207947A
Expired / Lapsed
US
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Liquid crystal compound
Assignee: Showa Shell Sekiyu KK
•
Filing: 1991-06-11
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Granted: 1993-05-04
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Expires: 2011-06-11
Abstract
Abstract Liquid crystal compound of the formula <IMAGE> wherein R1 and R2 each is a C1-18 alkyl group or an aralkyl group, R' is a haloalkyl group, X is -0-, -CO-, -COO- or direct bond, Y is -COO-, -OCO- or -CH2O-, (A) and (B) each is <IMAGE> <IMAGE> and p and l each is zero or one.
Inventors
- 👤 Yoshiichi Suzuki
- 👤 Noriko Yamakawa
- 👤 Yoshihiko Aihara
- 👤 Hiroyuki Mogamiya
- 👤 Toru Ooide
- 👤 Tadaaki Isozaki
- 👤 Yuvra Negi
- 👤 Shigenori Sakuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:13
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C09K19/0266; C07; C07C; C07C69/00; C07C69/76; C07C69/84; C07C69/88; C07C69/92; C07C69/94; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/32; C09K19/322
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
Liquid crystal compound having the formula (I)L ##STR136## wherein R 1 is a C 8-18 alkyl group and R 2 is a C 6-16 alkyl group, which has S * (3) phase showing tristable states.
Claim 2
Dependent Claim
35 words
Liquid crystal compound having the formula (I)L ##STR136## wherein R 1 is a C 8-18 alkyl group and R 2 is a C 6-16 alkyl group, which has S * (3) phase showing tristable states.
Claim 3
Dependent Claim
18 words
Liquid crystal compound according to claim 1, which is in the S * (3) phase showing tristable states.
Claim 4
Dependent Claim
35 words
Liquid crystal compound having the formula (XII): ##STR137## wherein R 1 is a C 8-18 alkyl group and R 2 is a C 6-16 alkyl group, which has S * (3) phase showing tristable states.
Claim 5
Dependent Claim
35 words
Liquid crystal compound having the formula (XII): ##STR137## wherein R 1 is a C 8-18 alkyl group and R 2 is a C 6-16 alkyl group, which has S * (3) phase showing tristable states.
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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) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |