US3446995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor circuits,devices and methods of improving electrical characteristics of latter
Assignee: International Business Machines Corp
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Filing: 1964-05-27
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Granted: 1969-05-27
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Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 Paul P Castrucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:04
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/111; H10D99/00; H10W; H10W20/00; H10W20/40; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3097308A
Cited
US3206670A
Cited
US3204160A
Cited
FR1339897A
Cited
FR1361215A
Cited
US3237721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |