US2764056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant exposure device for motion picture cameras
Assignee: Individual
•
Filing: 1953-03-18
•
Granted: 1956-09-25
•
Expires: 1973-03-18
Abstract
No abstract record available.
Inventors
- 👤 Peter J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:15
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB191217483A
Cited
DE393513C
Cited
GB275661A
Cited
US1800088A
Cited
US1839587A
Cited
US2015950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |