Patent US2493928A successfully refreshed from Google Patents.
US2493928A
Expired / Lapsed
US
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Exposure determining device for photographic cameras having cooperating indicia on camera and film magazine
Assignee: Individual
•
Filing: 1947-04-08
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Granted: 1950-01-10
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Expires: 1967-04-08
Abstract
No abstract record available.
Inventors
- 👤 Rath Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:34
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2043901A
Cited
US2080055A
Cited
US2217036A
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US2252573A
Cited
US2278338A
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US2186611A
Cited
US2282051A
Cited
US2256208A
Cited
US2421476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |