Patent US2635851A successfully refreshed from Google Patents.
US2635851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined clutch and brake for drawworks hoists
Assignee: United States Steel Corp
•
Filing: 1947-02-24
•
Granted: 1953-04-21
•
Expires: 1967-02-24
Abstract
No abstract record available.
Inventors
- 👤 August R Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:14
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/02; B66D1/14; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0158
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US88069A
Cited
US110521A
Cited
US1677338A
Cited
US792567A
Cited
US1555311A
Cited
US1936713A
Cited
US2357462A
Cited
US2536483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |