US3128412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive bistable switching circuit
Assignee: McGraw Edison Co
•
Filing: 1959-05-25
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Granted: 1964-04-07
•
Expires: 1979-05-25
Abstract
No abstract record available.
Inventors
- 👤 Andre T Abromaitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:42
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/42; H05; H05B; H05B47/00; H05B47/10; H05B47/105; H05B47/11; Y; Y02; Y02B; Y02B20/00; Y02B20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798965A
Cited
US2057384A
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US2476389A
Cited
US2726380A
Cited
US2939018A
Cited
GB818118A
Cited
US2891195A
Cited
US2913599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |