US4490276A
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Liquid crystal admixtures including chloro-cyanophenyl substituted benzoates
Assignee: MERECK PATENT FRANKFURTER STRASSE 250 6100 DARMSTADT A Co OF GERMANY GmbH
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Filing: 1982-09-20
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Granted: 1984-12-25
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Expires: 2002-09-20
Abstract
Abstract Disclosed are liquid crystal admixtures for electrooptical use including from about 17 wt. % to about 24 wt. % of phenyl dioxanylbenzoate compounds having the structural formula <IMAGE> from about 6 wt. % to about 10 wt. % of 3-chloro-4-cyanophenyl benzoate compounds having the structural formula <IMAGE> and from about 20 wt. % to about 40 wt. % of cyanophenyl dioxane compounds having the structural formula <IMAGE>
Inventors
- 👤 Ying-Yen Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:44
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/06; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
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References Cited (Backward Citations)
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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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |