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Patent US3008347A successfully refreshed from Google Patents.
US3008347A
Expired / Lapsed
US
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Variable stroke crankshaft construction
Assignee: Perkins Machine Co
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Filing: 1960-04-04
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Granted: 1961-11-14
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Bertram Webster Perkins
- 👤 Daniel W Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:01
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/22; F16C3/28; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2111; Y10T74/2173; Y10T74/2179
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2541573A
Cited
US2547197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |