Patent US2493340A successfully refreshed from Google Patents.
US2493340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion-picture reel end signal mechanism
Assignee: Individual
•
Filing: 1947-12-02
•
Granted: 1950-01-03
•
Expires: 1967-12-02
Abstract
No abstract record available.
Inventors
- 👤 Cohen Louis
- 👤 Stewart R Rahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:49
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1502434A
Cited
US1953819A
Cited
US1988841A
Cited
US2016506A
Cited
US2123084A
Cited
US2248351A
Cited
US2407361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |