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Patent US2428973A successfully refreshed from Google Patents.
US2428973A
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Automatic flywheel release clutch to facilitate motor stalling
Assignee: ROTOILLER Inc
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Filing: 1944-10-31
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Granted: 1947-10-14
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Expires: 1964-10-31
Abstract
No abstract record available.
Inventors
- 👤 Cadwallader W Kelsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:15
CPC Classifications
B; B62; B62D; B62D51/00; B62D51/004; A; A01; A01B; A01B33/00; A01B33/08; A01B33/082; F; F16; F16D; F16D7/00; F16D7/02; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US405845A
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US1171010A
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US1189207A
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US1218719A
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US1419722A
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US1412308A
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US1848260A
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US1996510A
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US2229497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |