Patent US2863537A successfully refreshed from Google Patents.
US2863537A
Expired / Lapsed
US
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Heavy duty friction clutch
Assignee: Lipe Rollway Corp
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Filing: 1957-03-04
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Granted: 1958-12-09
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Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 Robert S Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:34
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/22; F16D13/38; F16D13/385; F16D67/00; F16D67/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |