US2765763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film type and speed indicator for photographic cameras
Assignee: Rollei Werke Franke und Heidecke GmbH and Co KG
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Filing: 1953-10-20
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Granted: 1956-10-09
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Expires: 1973-10-20
Abstract
No abstract record available.
Inventors
- 👤 Bretthauer Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:57
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/60; G03B1/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2350733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |