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US2991982A
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US
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Centrifugal fluid moving device
Assignee: Individual
•
Filing: 1957-09-12
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Granted: 1961-07-11
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Expires: 1977-09-12
Abstract
No abstract record available.
Inventors
- 👤 Sigurd O Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/58; F04D29/582; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2350839A
Cited
GB552391A
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US2474410A
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US2441427A
Cited
US2689680A
Cited
US2615616A
Cited
US2671604A
Cited
US2746434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |