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US4399298A
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Carboxylic acid ester derivatives of 4-fluorophenol
Assignee: JNC Corp
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Filing: 1981-02-12
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Granted: 1983-08-16
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Expires: 2001-02-12
Abstract
Abstract Novel fluorine-containing organic compounds having a positive dielectric anisotropy, useful as component(s) of liquid crystal compositions, and liquid crystal compositions containing the same are provided. The compounds have the general formula ##STR1## R 1 and R 3 both are 1-10 C alkyl or alkoxy; R 2 is H or 1-10 C alkyl; and R 4 is 1-10 C alkyl.
Inventors
- 👤 Shigeru Sugimori
- 👤 Yukio Honda
- 👤 Tetsuhiko Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:19
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
Ester derivatives of p-fluorophenol expressed by the general formula ##STR8## wherein Z represents a group selected from the group consisting of ##STR9## R 1 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; R 2 represents H or an alkyl group having 1 to 10 carbon atoms; R 3 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms and R 4 represents an alkyl group having 1 to 10 carbon atoms.
Claim 2
Dependent Claim
83 words
Ester derivatives of p-fluorophenol expressed by the general formula ##STR8## wherein Z represents a group selected from the group consisting of ##STR9## R 1 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; R 2 represents H or an alkyl group having 1 to 10 carbon atoms; R 3 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms and R 4 represents an alkyl group having 1 to 10 carbon atoms.
Claim 3
Dependent Claim
42 words
Ester derivatives of 4-fluorophenol according to claim 1 wherein said derivatives are 4"-fluorophenyl esters of trans-4-(4'-substituted phenyl)-cyclohexanecarboxylic acids expressed by the general formula ##STR10## wherein R 1 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms.
Claim 4
Dependent Claim
39 words
Ester derivatives of 4-fluorophenol according to claim 1 wherein said derivatives are 4"-fluorophenyl esters of 4-(trans-4'-substituted cyclohexylcarbonyloxy)-benzoic acids expressed by the general formula ##STR11## wherein R 2 represents H or an alkyl group having 1 to 10 carbon atoms.
Claim 5
Dependent Claim
42 words
Ester derivatives of 4-fluorophenol according to claim 1 wherein said derivatives are 4"-fluorophenyl esters of 4-(4'-substituted benzoyloxy)-benzoic acids expressed by the general formula ##STR12## wherein R 3 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms.
Claim 6
Dependent Claim
36 words
Ester derivatives of 4-fluorophenol according to claim 1 wherein said derivatives are 4'-fluorophenyl esters of 4-acryloxybenzoic acids expressed by the general formula ##STR13## wherein R 4 represents an alkyl group having 1 to 10 carbon atoms.
Claim 7
Dependent Claim
91 words
Liquid crystal compositions comprising at least one of ester derivatives of p-fluorophenol expressed by the general formula ##STR14## wherein Z represents a group selected from the group consisting of ##STR15## R 1 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; R 2 represents H or an alkyl group having 1 to 10 carbon atoms; R 3 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; and R 4 represents an alkyl group having 1 to 10 carbon atoms.
Claim 8
Dependent Claim
91 words
Liquid crystal compositions comprising at least one of ester derivatives of p-fluorophenol expressed by the general formula ##STR14## wherein Z represents a group selected from the group consisting of ##STR15## R 1 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; R 2 represents H or an alkyl group having 1 to 10 carbon atoms; R 3 represents an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; and R 4 represents an alkyl group having 1 to 10 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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |