US3011693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus relating to centrifugal wheel inlet boundary control
Assignee: CLARAGE FAN CO
•
Filing: 1956-12-05
•
Granted: 1961-12-05
•
Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Sewell H Downs
- 👤 Wendell C Zeluff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/16; F04D29/161; F04D29/162; F04D29/40; F04D29/42; F04D29/4206; F04D29/4226; Y; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2690293A
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US2638835A
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US2637486A
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US2798658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |