US2470139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera shutter
Assignee: Individual
•
Filing: 1946-02-08
•
Granted: 1949-05-17
•
Expires: 1966-02-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1917245A
Cited
US1814756A
Cited
US1936595A
Cited
US2397009A
Cited
US2323301A
Cited
US2403730A
Cited
US2399476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |