US3826757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room temperature nematic liquid crystals
Assignee: Raytheon Co
•
Filing: 1972-09-18
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Granted: 1974-07-30
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Expires: 1992-09-18
Abstract
Abstract THE PRESENT INVENTION INVOLVES FORMULATION OF ROOM TEMPERATURE NEMATIC LIQUID CRYSTALS INVOLVING COMPOUNDS WHICH ARE SOLID AT ROOM TEMPERATURE, BUT WHEN DISSOLVED IN CERTAIN SOLVENTS BECOME TRUE LIQUID CYRSTALS.
Inventors
- 👤 S Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:46
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/22
Claims Analysis
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |