Patent US2907427A successfully refreshed from Google Patents.
US2907427A
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Spring clutch
Assignee: Viking Tool & Machine Corp
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Filing: 1953-12-18
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Granted: 1959-10-06
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Expires: 1973-12-18
Abstract
No abstract record available.
Inventors
- 👤 Archie J Dowd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:42
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/105; F16D41/00; F16D41/20; F16D41/206; F16H; F16H31/00; F16H31/003; F16H31/006; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529; Y10T74/1558; Y10T74/1577; Y10T74/1584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US255957A
Cited
US631957A
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US1403767A
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US2488766A
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US2575012A
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US2577181A
Cited
US2685208A
Cited
US2740624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |