Patent US2669982A successfully refreshed from Google Patents.
US2669982A
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Ambient air control of blower by-passes
Assignee: Fairbanks Morse and Co
•
Filing: 1951-09-07
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Granted: 1954-02-23
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Expires: 1971-09-07
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Schowalter
- 👤 Matthew L Foreman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0202; F02D2700/0205; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/1044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1821662A
Cited
US1838408A
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US2088954A
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US2388669A
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US2504243A
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US2558884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |