US3061739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple channel field effect semiconductor
Assignee: AT&T Inc
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Filing: 1958-12-11
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Granted: 1962-10-30
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Expires: 1978-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry A Stone
- 👤 Jr Raymond M Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:07
CPC Classifications
H; H10; H10D; H10D10/00; H10D30/00; H10D30/80; H10D62/00; H10D62/10; H10D84/00; H10D84/60; H10D84/645; H10D84/80; H10D84/86; H10D99/00; H10P; H10P95/00; H10P95/50
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |