US2674677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive cell
Assignee: Combustion Control Corp
•
Filing: 1951-03-17
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Granted: 1954-04-06
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Expires: 1971-03-17
Abstract
No abstract record available.
Inventors
- 👤 Norman C Anderson
- 👤 Philip N Bredesen
- 👤 Phillip J Cade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:25
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49169; Y10T29/49171
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316350A
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US1790736A
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US1697451A
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US2036457A
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US2327487A
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US2480113A
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US2448516A
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US2516873A
Cited
US2423476A
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US2547173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |