US2581313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed clutch
Assignee: GEN IND CO
•
Filing: 1948-11-12
•
Granted: 1952-01-01
•
Expires: 1968-11-12
Abstract
No abstract record available.
Inventors
- 👤 Woude Fritz R Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:48
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/04; F16D43/06; F16D43/08; F16D43/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US689885A
Cited
US755852A
Cited
US1282522A
Cited
US1651800A
Cited
GB268379A
Cited
US1735064A
Cited
US1823555A
Cited
US1983250A
Cited
US2323008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |