US2729319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid operated multiple disc clutch
Assignee: National Machinery Co
•
Filing: 1951-10-03
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Granted: 1956-01-03
•
Expires: 1971-10-03
Abstract
No abstract record available.
Inventors
- 👤 Robert G Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190720737A
Cited
US1524294A
Cited
US1722522A
Cited
US2091269A
Cited
US2089733A
Cited
FR46913E
Cited
US2241241A
Cited
US2360489A
Cited
US2481834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |