US2492723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating mechanism for symmetrical opening camera shutters
Assignee: GAF Chemicals Corp
•
Filing: 1946-06-25
•
Granted: 1949-12-27
•
Expires: 1966-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Willcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; G03B9/18; G03B9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1341823A
Cited
US1856308A
Cited
US2269400A
Cited
US2326077A
Cited
US2308002A
Cited
US2371072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |