US2933129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid clutch controlled vortex pump
Assignee: Chandler Evans Inc
•
Filing: 1951-11-15
•
Granted: 1960-04-19
•
Expires: 1971-11-15
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:40
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/022; F16; F16H; F16H41/00; F16H41/04; F16H41/22; F16H61/00; F16H61/38; F16H61/48; F16H61/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US879059A
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US2400307A
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US2400306A
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US2425885A
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US2424035A
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US2441855A
Cited
US2599680A
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US2673447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |