US3550256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of surface inversion of p- and n-type silicon using dense dielectrics
Assignee: Fairchild Semiconductor Corp
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Filing: 1967-12-21
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Granted: 1970-12-29
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Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Bruce E Deal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:03
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/102; H10D62/112; H10D99/00; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S438/00; Y10S438/91; Y10S438/958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |