Patent EP0581233A1 successfully refreshed from Google Patents.
US2777545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotation retarding device for a reel carrying shaft
Assignee: CBS Broadcasting Inc
•
Filing: 1952-07-05
•
Granted: 1957-01-15
•
Expires: 1972-07-05
Abstract
No abstract record available.
Inventors
- 👤 Jr John F Rockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:30
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/02; B65H59/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1981133A
Cited
US2052788A
Cited
US2071192A
Cited
US2193121A
Cited
US2353408A
Cited
US2343461A
Cited
US2620900A
Cited
US2596654A
Cited
US2656026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |