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US2741932A
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US
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Crankshaft and method of making the same
Assignee: Isthmian Metals Inc
•
Filing: 1952-04-23
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Granted: 1956-04-17
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Expires: 1972-04-23
Abstract
No abstract record available.
Inventors
- 👤 Lyman F Whitney
- 👤 William P Matthew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:16
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/06; F16C3/10; F16C3/12; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2174; Y10T74/2175
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1063323A
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US2229330A
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US2256726A
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US2297554A
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US2372202A
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US2364109A
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US2337157A
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US2378686A
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US2464591A
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US2451099A
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US2606362A
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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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |