US2160383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive electric device and circuit therefor
Assignee: AT&T Inc
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Filing: 1936-12-30
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Granted: 1939-05-30
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Expires: 1956-12-30
Abstract
No abstract record available.
Inventors
- 👤 Walter F Kannenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/14; H10F99/00; G; G01; G01J; G01J1/00; G01J1/42; H10D; H10D10/00; H10D48/00; H10D48/01; H10D48/07; H10D62/00; H10D62/80; H10F30/00; H10F30/20
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) | 1942-05-29 | 1942-11-28 | 1943-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-29 | 1946-11-28 | 1947-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-29 | 1950-11-28 | 1951-05-30 | $7700.00 | Window Closed / Lapsed |