US2930303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for shutter release in camera
Assignee: Canon Inc
•
Filing: 1955-11-16
•
Granted: 1960-03-29
•
Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Sago Yoshiharu
- 👤 Nemoto Satoru
- 👤 Kakunodate Masamichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:52
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE641181C
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US2057198A
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US2104094A
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DE644420C
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US2173991A
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US2117429A
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GB500626A
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US2227240A
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GB526498A
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US2229606A
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US2364466A
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DE825483C
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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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |