US3051067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control mechanism for preset iris diaphragms of photographic cameras
Assignee: Canon Inc
•
Filing: 1957-07-29
•
Granted: 1962-08-28
•
Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Goshima Takeshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:18
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/02; G03B9/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2213742A
Cited
US2356880A
Cited
US2503777A
Cited
US2803182A
Cited
US2805610A
Cited
FR1116327A
Cited
FR1117941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |