US4558151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nematic liquid crystalline compounds
Assignee: DIC Corp
•
Filing: 1983-10-28
•
Granted: 1985-12-10
•
Expires: 2003-10-28
Abstract
Abstract A compound represented by the general formula <IMAGE> wherein A denotes <IMAGE> +TR <IMAGE> R and R', independently from each other, denote a linear alkyl group having 1 to 9 carbon atoms, and <IMAGE> is a cyclohexane ring arranged in a trans(equatorial-equatorial)form.
Inventors
- 👤 Haruyoshi Takatsu
- 👤 Hisato Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/782; C07C49/792; C07C61/00; C07C61/12; C07C63/00; C07C63/33; C07C63/49
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
40 words
A compound represented by the general formula ##STR63## wherein A denotes ##STR64## R and R', independently from each other, denote a linear alkyl group having 1 to 9 carbon atoms, and ##STR65## is a cyclohexane ring arranged in a trans(equatorial-equatorial)form.
Claim 2
Dependent Claim
40 words
A compound represented by the general formula ##STR63## wherein A denotes ##STR64## R and R', independently from each other, denote a linear alkyl group having 1 to 9 carbon atoms, and ##STR65## is a cyclohexane ring arranged in a trans(equatorial-equatorial)form.
Claim 3
Dependent Claim
37 words
The compound of claim 1 wherein R and R' are selected from the group consisting of C 2 H 5 --, n--C 3 H 7 --, n--C 4 H 9 -- and n--C 5 H 11 --.
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |