US3819531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal compositions
Assignee: Xerox Corp
•
Filing: 1972-02-24
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Granted: 1974-06-25
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Expires: 1992-02-24
Abstract
Abstract Liquid crystalline compositions having the optical properties of the cholesteric mesophase are disclosed. The compositions comprise at least one nematic liquid crystalline material and at least one potentially cholesteric material which has a molecular structure which is similar to that of a nematic liquid crystal. Uses of the novel compositions are also described.
Inventors
- 👤 F Saeva
- 👤 R Schank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:30
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C07; C07C; C07C291/00; C07C291/02; C07C291/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3675987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |