Patent US2912913A successfully refreshed from Google Patents.
US2912913A
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US
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Shutter and diaphragm adjusting mechanism for photographic cameras
Assignee: Rollei Werke Franke und Heidecke GmbH and Co KG
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Filing: 1954-01-18
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Granted: 1959-11-17
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 Bretthauer Hermann
- 👤 Albrecht Hermann Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:27
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191407787A
Cited
DE666365C
Cited
US2209156A
Cited
US2342819A
Cited
US2509385A
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US2596328A
Cited
FR1028877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |