Patent US2610540A successfully refreshed from Google Patents.
US2610540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control means for film driving mechanisms
Assignee: American Optical Corp
•
Filing: 1948-12-03
•
Granted: 1952-09-16
•
Expires: 1968-12-03
Abstract
No abstract record available.
Inventors
- 👤 Richard C Beitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:03
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1227815A
Cited
US1815486A
Cited
US2139295A
Cited
US2099682A
Cited
US2264333A
Cited
US2412551A
Cited
US2413070A
Cited
US2487476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |