US3479234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing field effect transistors
Assignee: General Electric Co
•
Filing: 1967-05-01
•
Granted: 1969-11-18
•
Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Peter V Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:50
CPC Classifications
H; H10; H10D; H10D99/00; H10D30/00; H10D30/01; H10D30/021; H10D30/027; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/051; Y10S148/052; Y10S148/053; Y10S148/141; Y10S148/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929006A
Cited
US3104991A
Cited
US2975080A
Cited
US3387358A
Cited
US3241013A
Cited
US3246173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |