US3374473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable optically read ferroelectric memory device
Assignee: Individual
•
Filing: 1967-04-12
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Granted: 1968-03-19
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Expires: 1987-04-12
Abstract
No abstract record available.
Inventors
- 👤 Stewart E Cummins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:21
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/475; G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/05; G11; G11C; G11C11/00; G11C11/21; G11C11/22; G11C13/00; G11C13/04; G11C13/047
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |