Patent US2625264A successfully refreshed from Google Patents.
Patent US3564515A successfully refreshed from Google Patents.
US3564515A
Expired / Lapsed
US
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Information handling apparatus
Assignee: General Dynamics Corp
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Filing: 1964-01-30
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Granted: 1971-02-16
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Expires: 1984-01-30
Abstract
Abstract A MEMORY STORAGE SYSTEM WHICH USES THE INTERACTION OF A TRAVELING STRESS PULSE AND AN ELECTRICAL FIELD TO POLARIZE A FERROELECTRIC MATERIAL TO REPRESENT INFORMATION.
Inventors
- 👤 Joseph W Gratian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:28
CPC Classifications
G; G11; G11C; G11C8/00; G11C8/005
Claims Analysis
Total Claims: 0
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |