US2631708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed centrifugal clutch
Assignee: Knapp Monarch Co
•
Filing: 1949-08-13
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Granted: 1953-03-17
•
Expires: 1969-08-13
Abstract
No abstract record available.
Inventors
- 👤 Alvin W Holstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:41
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/04; F16D43/06; F16D43/08; F16D43/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513095A
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US1432927A
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US689885A
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US1062780A
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US1186638A
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US1445687A
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US2064779A
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US2374434A
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US2555929A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |