Patent US4713468A successfully refreshed from Google Patents.
US4713468A
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Tolan-type nematic liquid crystalline compounds
Assignee: DIC Corp
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Filing: 1987-02-11
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Granted: 1987-12-15
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Expires: 2007-02-11
Abstract
Abstract A liquid crystalline compound of the general formula <IMAGE> (I) wherein <IMAGE> represents <IMAGE> R and R', independently from each other, represent a linear alkyl group having 1 to 10 carbon atoms, an alkoxymethylene group whose alkoxy moiety has 1 to 10 carbon atoms, a cyano group or a halogen atom, and n and m, independently from each other, represent 0 or 1.
Inventors
- 👤 Haruyoshi Takatsu
- 👤 Makoto Sasaki
- 👤 Yasuyuki Tanaka
- 👤 Hisato Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
C; C07; C07C; C07C255/00; C07C13/00; C07C13/28; C07C15/00; C07C15/40; C07C15/50; C07C15/54; C07C25/00; C07C25/24; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/164; C07C43/166; C07C43/168; C07C45/00; C07C45/45; C07C45/46; C07D; C07D319/00; C07D319/04; C07D319/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/14; C09K19/18; C09K19/30; C09K19/3001; C09K19/3059; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
47 words
A compound of the general formula ##STR117## wherein R represents a linear alkyl group having 1 to 10 carbon atoms, R' represents a linear alkyl group having 1 to 10 carbon atoms, a cyano group or a halogen atom; and the cyclohexane ring has a trans(equatorial-equatorial) configuration.
Claim 2
Dependent Claim
47 words
A compound of the general formula ##STR117## wherein R represents a linear alkyl group having 1 to 10 carbon atoms, R' represents a linear alkyl group having 1 to 10 carbon atoms, a cyano group or a halogen atom; and the cyclohexane ring has a trans(equatorial-equatorial) configuration.
Claim 3
Dependent Claim
18 words
The compound of claim 1 wherein R is a linear alkyl of from 2 to 5 carbon atoms.
Claim 4
Dependent Claim
11 words
The compound of claim 2 wherein R' is a halogen atom.
Claim 5
Dependent Claim
11 words
The compound of claim 2 wherein R' is a cyano group.
Claim 6
Dependent Claim
19 words
The compound of claim 2 wherein R' is a linear alkyl group of from 2 to 5 carbon atoms.
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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) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |