Patent US2935920A successfully refreshed from Google Patents.
US2935920A
Expired / Lapsed
US
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Interchangeable lens camera with coupled exposure meter
Assignee: Hittech Prontor GmbH
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Filing: 1957-07-11
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Granted: 1960-05-10
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Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 Waldemar T Rentschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:49
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE756282C
Cited
US2252573A
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US2305294A
Cited
US2418370A
Cited
US2596328A
Cited
FR1111448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |