US2627347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric control circuit
Assignee: University of California Berkeley
•
Filing: 1949-08-22
•
Granted: 1953-02-03
•
Expires: 1969-08-22
Abstract
No abstract record available.
Inventors
- 👤 John B Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/04; B07C5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1929273A
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US2096427A
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US2149177A
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US2244826A
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US2312357A
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US2433946A
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US2433557A
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US2413070A
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US2434680A
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US2445460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-03 | 1956-08-04 | 1957-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-03 | 1960-08-04 | 1961-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-03 | 1964-08-04 | 1965-02-03 | $7700.00 | Window Closed / Lapsed |