Patent US2462937A successfully refreshed from Google Patents.
US2462937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating the time of exposure for photographic enlargements
Assignee: Individual
•
Filing: 1945-08-07
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Granted: 1949-03-01
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Expires: 1965-08-07
Abstract
No abstract record available.
Inventors
- 👤 Bernard Maurice Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:21
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1609972A
Cited
US1926597A
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DE544038C
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DE572995C
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DE604786C
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US2124889A
Cited
US2291613A
Cited
US2207375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |