US2568790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film reel drive and holdback mechanism
Assignee: RCA Corp
•
Filing: 1945-06-02
•
Granted: 1951-09-25
•
Expires: 1965-06-02
Abstract
No abstract record available.
Inventors
- 👤 Milford E Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1234545A
Cited
US1372675A
Cited
GB258264A
Cited
US2000436A
Cited
US2184331A
Cited
US2224899A
Cited
US2325885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |