US2464559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera diaphragm adjusting mechanism
Assignee: Individual
•
Filing: 1945-03-31
•
Granted: 1949-03-15
•
Expires: 1965-03-31
Abstract
No abstract record available.
Inventors
- 👤 John B Davenport
- 👤 Gilbert Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1235685A
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US1627722A
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GB187077A
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US1546060A
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US2026675A
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US2213749A
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US2278173A
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US2239379A
Cited
US2351834A
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US2369199A
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US2334075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |