Patent US3040643A successfully refreshed from Google Patents.
US3040643A
Expired / Lapsed
US
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Photographic intra-lens shutter with incorporated electric exposure-meter
Assignee: Hittech Prontor GmbH
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Filing: 1956-02-29
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Granted: 1962-06-26
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Waldemar T Rentschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:42
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2041843A
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GB502908A
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US2297262A
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DE756282C
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US2261532A
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US2412424A
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US2518717A
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US2613282A
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US2655848A
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US2647201A
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US2745021A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |