US3815972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low voltage liquid crystal display
Assignee: Olivetti SpA
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Filing: 1972-08-09
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Granted: 1974-06-11
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Expires: 1992-08-09
Abstract
Abstract An improved orientation type liquid crystal display having a layer of a mixture of liquid crystal materials confined between a pair of substrates and electrodes for applying an electric field across the substrate. The mixture of liquid crystal materials includes between 5 and 60 percent by weight of an orientationtype liquid crystal material and between 95 and 45 percent by weight of a dynamic scattering type liquid crystal material.
Inventors
- 👤 P Hsieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:05
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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |