Patent US3504601A successfully refreshed from Google Patents.
US3504601A
Expired / Lapsed
US
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Electronic exposure control for a photographic shutter
Assignee: ERNST AND WILHELM BERTRAM
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Filing: 1967-06-26
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Granted: 1970-04-07
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Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 Joachim Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2978970A
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US3063354A
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US3257919A
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US3292516A
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US3245332A
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US3336850A
Cited
US3286610A
Cited
US3324779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |