Patent US3418493A successfully refreshed from Google Patents.
US3418493A
Expired / Lapsed
US
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Semiconductor memory device
Assignee: Westinghouse Electric Corp
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Filing: 1964-10-05
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Granted: 1968-12-24
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Uzunoglu Vasil
- 👤 Jr Phillip R Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03C; H03C1/00; H03C1/36; H03F; H03F3/00; H03F3/04; H03F3/14; H03G; H03G1/00; H03G1/0005; H03G1/0017; H03K3/00; H03K3/02; H03K3/26; H10; H10D; H10D18/00; H10D18/60; H10D18/65; H10D18/655; H10D48/00; H10D48/30; H10D48/32; H10D84/00; H10D84/101; H10D84/121; H10D84/131; H10D84/133; H10D99/00; H10P; H10P95/00
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |