US2429500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric control
Assignee: PHOTOSWITCH Inc
•
Filing: 1942-01-17
•
Granted: 1947-10-21
•
Expires: 1962-01-17
Abstract
No abstract record available.
Inventors
- 👤 William F Wolfner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:07
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/20; B26D5/30; B26D5/34; Y; Y10; Y10T; Y10T83/00; Y10T83/141; Y10T83/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2249820A
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US2031503A
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US2002374A
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US2052263A
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US2052255A
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US2169026A
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US2195006A
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US2262362A
Cited
US2250209A
Cited
US2348862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |