Patent US3414972A successfully refreshed from Google Patents.
US3414972A
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US
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Method for making a memory device
Assignee: Unisys Corp
•
Filing: 1964-06-25
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Granted: 1968-12-10
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Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Gilbert R Reid
- 👤 Frank W Ammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:25
CPC Classifications
G; G11; G11C; G11C7/00; G11C11/00; G11C11/02; G11C11/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2724674A
Cited
US3025201A
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US3077658A
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US3077021A
Cited
US3240624A
Cited
US3340606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |