US3772209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal compositions
Assignee: Eastman Kodak Co
•
Filing: 1972-01-21
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Granted: 1973-11-13
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Expires: 1992-01-21
Abstract
Abstract A NEMATIC LIQUID CRYSTAL COMPOSITION HAVING A VERY BROAD MESOPHASE COMPRISING A MIXTURE OF AT LEAST TOW COMPOUNDS OF THE FORMULA: (4-R-PHENYL)-CH=N-(1,4-PHENYLENE)-R1 WHEREIN EACH R AND R1 ARE RADICALS SELECTED FROM THE GROUP CONSISTING OF A SATRUATED ALKOXY RADICAL AND AN ALKYL RADICAL EACH HAVING FROM 1 TO 9 CARBON ATOMS AND ONLY ONE OF EACH R AND R1 IS ALKYL, AND AT LEAST ONE COMPOUND OF THE FORMULA: (4-(R2-(COO)X-)PHENYL)-OOC-(1,4-PHENYLENE)-(OOC)Y-R3 WHEREIN R2 AND R3 ARESATURATED ALKOXY RADICALS OF FROM 1 TO 9 CARBON ATOMS, ONE OF X AND Y IS O AND THE OTHER IS 1.
Inventors
- 👤 D Batesky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/48
Claims Analysis
Total Claims: 0
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |