US2920723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal expanding brake
Assignee: ZF Active Safety US Inc
•
Filing: 1953-12-18
•
Granted: 1960-01-12
•
Expires: 1973-12-18
Abstract
No abstract record available.
Inventors
- 👤 Charles W Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:32
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/46; F16D51/48; F16D51/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR586844A
Cited
US1690855A
Cited
US1871441A
Cited
US1900178A
Cited
US2065382A
Cited
US2149614A
Cited
US2209772A
Cited
US2475491A
Cited
GB657117A
Cited
FR1042103A
Cited
FR1035206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |