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US3971824A
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P-Benzoyloxybenzoate
Assignee: Eastman Kodak Co
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Filing: 1975-06-11
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Granted: 1976-07-27
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Expires: 1995-06-11
Abstract
Abstract Liquid crystalline materials comprised of substituted phenyl p-benzoyloxybenzoates are useful in electro-optical elements. These materials have low crystal to mesophase transition temperatures and have a broad mesophase temperature range.
Inventors
- 👤 James P. Van Meter
- 👤 Bruce H. Klanderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:30
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A liquid crystalline compound of the formula: ##SPC6## wherein: R 1 is an alkyl group of about 4 to 8 carbon atoms, R 2 is an alkyl group of about 4 to 8 carbon atoms or an alkoxy group having about 4 to 8 carbon atoms, and X is a halogen atom.
Claim 2
Dependent Claim
52 words
A liquid crystalline compound of the formula: ##SPC6## wherein: R 1 is an alkyl group of about 4 to 8 carbon atoms, R 2 is an alkyl group of about 4 to 8 carbon atoms or an alkoxy group having about 4 to 8 carbon atoms, and X is a halogen atom.
Claim 3
Dependent Claim
27 words
A liquid crystalline compound as described in claim 1 wherein R 1 and R 2 each represent an alkyl group of about 4 to 8 carbon atoms.
References Cited (Backward Citations)
US3836478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |