Patent US2444675A successfully refreshed from Google Patents.
US2444675A
Expired / Lapsed
US
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Exposure time control for photographic printing apparatus
Assignee: Individual
•
Filing: 1945-07-19
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Granted: 1948-07-06
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Expires: 1965-07-19
Abstract
No abstract record available.
Inventors
- 👤 Rath Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:07
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209; G01J1/4223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2038430A
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US2183217A
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US2090825A
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US2378433A
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US2238762A
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US2309048A
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US2298344A
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US2382220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |