Patent US2501547A successfully refreshed from Google Patents.
US2501547A
Expired / Lapsed
US
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Vest pocket exposure meter having louvers, light cell, and instrument magnet in contacting layers
Assignee: General Electric Co
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Filing: 1947-08-29
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Granted: 1950-03-21
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Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Allen G Stimson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:44
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209; G01J1/4214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932043A
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US2046665A
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US2015431A
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US2058531A
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US2123670A
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US2105255A
Cited
US2151901A
Cited
US2346529A
Cited
US2465970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |