Patent US2492029A successfully refreshed from Google Patents.
US2492029A
Expired / Lapsed
US
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Fan assembly
Assignee: Schwitzer Cummins Co
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Filing: 1946-07-13
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Granted: 1949-12-20
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Expires: 1966-07-13
Abstract
No abstract record available.
Inventors
- 👤 Kurt A Beier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:06
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/02; F04; F04D; F04D29/00; F04D29/26; F04D29/263; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2126708A
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US2214512A
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US2235605A
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US2098703A
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US2312822A
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US2207376A
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US2338302A
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US2354101A
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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) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |