US2987686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocells
Assignee: TDK Micronas GmbH
•
Filing: 1956-09-21
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Granted: 1961-06-06
•
Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Richmond B Mcquistan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
H; H10; H10F; H10F30/00; Y; Y02; Y02P; Y02P60/00; Y02P60/12; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T403/00; Y10T403/21; Y10T403/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2418460A
Cited
US2604229A
Cited
US2544261A
Cited
US2639833A
Cited
US2708250A
Cited
US2884345A
Cited
US2742550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |