US3445924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fabricating insulated-gate field effect transistors having controlled operating characteristics
Assignee: International Business Machines Corp
•
Filing: 1965-06-30
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Granted: 1969-05-27
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 George Cheroff
- 👤 Frederick Hochberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:16
CPC Classifications
H; H10; H10P; H10P95/00; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/83; H10D99/00; Y; Y10; Y10S; Y10S438/00; Y10S438/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3056888A
Cited
US3311756A
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 |