US3409404A
Expired / Lapsed
US
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Analytical methods and devices employing cholesteric liquid crystalline materials
Assignee: Westinghouse Electric Corp
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Filing: 1963-11-13
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Granted: 1968-11-05
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 James L Fergason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:31
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/50; G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/19; Y10T436/196666; Y10T436/20; Y10T436/206664; Y10T436/21; Y10T436/212
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |