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US4200580A
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Dioxanylphenyl benzoate liquid crystal compounds
Assignee: MERECK PATENT FRANKFURTER STRASSE 250 6100 DARMSTADT A Co OF GERMANY GmbH
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Filing: 1979-03-05
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Granted: 1980-04-29
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Expires: 1999-03-05
Abstract
Abstract Compounds of the formula: ##STR1## wherein R 1 is a straight chain alkyl group of 1 to 10 carbon atoms and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 . The dioxanylphenyl benzoate compounds of the invention are useful as liquid crystal materials in electro-optical displays.
Inventors
- 👤 Ying Y. Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:10
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
A compound of the formula: ##STR6## wherein R 1 is an alkyl group having 1 to 10 carbon atoms and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 2
Dependent Claim
41 words
A compound of the formula: ##STR6## wherein R 1 is an alkyl group having 1 to 10 carbon atoms and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 3
Dependent Claim
15 words
A compound as claimed in claim 1 wherein R 1 is a straight chain alkyl.
Claim 4
Dependent Claim
45 words
A liquid crystal material of the formula: ##STR7## wherein R 1 is a straight chain alkyl group having 1 to 10 carbon atoms and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 5
Dependent Claim
45 words
A liquid crystal material of the formula: ##STR7## wherein R 1 is a straight chain alkyl group having 1 to 10 carbon atoms and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |