US2981391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch
Assignee: Cleveland Crane and Engineering Co
•
Filing: 1959-08-20
•
Granted: 1961-04-25
•
Expires: 1979-08-20
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:17
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/10; F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1967065A
Cited
US2169639A
Cited
US2221014A
Cited
US2777702A
Cited
US2759583A
Cited
US2761709A
Cited
US2741353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |