Patent US2331180A successfully refreshed from Google Patents.
US2331180A
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US
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Friction clutch
Assignee: Farrel Birmingham Co Inc
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Filing: 1941-12-15
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Granted: 1943-10-05
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Expires: 1961-12-15
Abstract
No abstract record available.
Inventors
- 👤 Emil R Gasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:30
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/04; F16D25/042; F16D25/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-10-04 | 1947-04-05 | 1947-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-04 | 1951-04-05 | 1951-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-04 | 1955-04-05 | 1955-10-05 | $7700.00 | Window Closed / Lapsed |