Patent US2860558A successfully refreshed from Google Patents.
US2860558A
Expired / Lapsed
US
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Duplex camera shutter
Assignee: Individual
•
Filing: 1953-11-03
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Granted: 1958-11-18
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Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick L O Roehrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:07
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US738066A
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US2051225A
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US2053513A
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US2196604A
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US2361661A
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US2443208A
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US2505140A
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US2541555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |