US4478741A
Expired / Lapsed
US
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4-Alkylcyclohexyl 4-alkanoyloxybenzoate and liquid crystal composition thereof
Assignee: Sharp Corp
•
Filing: 1983-04-29
•
Granted: 1984-10-23
•
Expires: 2003-04-29
Abstract
Abstract A liquid crystal composition contains a compound of the formula: ##STR1## wherein R and R' are straight chain alkyl groups each having 1 to 7 carbon atoms.
Inventors
- 👤 Kenichi Nakagawa
- 👤 Shigehiro Minezaki
- 👤 Fumiaki Funada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:35
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
24 words
A liquid crystal compound of the formula: ##STR9## wherein R and R' are straight chain alkyl groups each having 1 to 7 carbon atoms.
Claim 2
Dependent Claim
24 words
A liquid crystal compound of the formula: ##STR9## wherein R and R' are straight chain alkyl groups each having 1 to 7 carbon atoms.
Claim 3
Dependent Claim
27 words
A liquid crystal composition which contains compounds of the formula: ##STR10## wherein R and R' are straight chain alkyl groups each having 1 to 7 carbon atoms.
Claim 4
Dependent Claim
27 words
A liquid crystal composition which contains compounds of the formula: ##STR10## wherein R and R' are straight chain alkyl groups each having 1 to 7 carbon atoms.
Claim 5
Dependent Claim
10 words
The compound of claim 1, which has the formula: ##STR11##
Claim 6
Dependent Claim
12 words
The compound of claim 1, wherein said compound has the formula: ##STR12##
Claim 7
Dependent Claim
11 words
The compound of claim 1, wherein R is a pentyl group.
Claim 8
Dependent Claim
12 words
The composition of claim 2, which contains a mixture of said compounds.
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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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |