US2443542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive electric device including silicon
Assignee: AT&T Inc
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Filing: 1942-09-17
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Granted: 1948-06-15
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Expires: 1962-09-17
Abstract
No abstract record available.
Inventors
- 👤 Russell S Ohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
H; H10; H10N; H10N70/00; C; C22; C22F; C22F3/00; C30; C30B; C30B11/00; G; G01; G01D; G01D5/00; G01D5/26; G01J; G01J1/00; G01J1/42; G01J5/00; G01J5/10; G01J5/20; G01J5/22; G01J5/24; G04; G04C; G04C10/00; H02; H02J; H02J7/00; H10D; H10D62/00; H10F; H10F10/00; H10F10/10; H10F99/00; H10P; H10P95/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50
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) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |