US2641713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor photoelectric device
Assignee: AT&T Inc
•
Filing: 1951-03-21
•
Granted: 1953-06-09
•
Expires: 1971-03-21
Abstract
No abstract record available.
Inventors
- 👤 John N Shive
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; H01; H01H; H01H47/00; H01H47/22; H01H47/24; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H10F99/00; H10P; H10P32/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402662A
Cited
US2482980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |