US3250440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping apparatus
Assignee: FMC Corp
•
Filing: 1963-12-23
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Granted: 1966-05-10
•
Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert G Trout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
B; B63; B63B; B63B13/00; F; F04; F04D; F04D9/00; F04D9/007; F04D9/008; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PUMPING APPARATUS COMPRISING A MAIN PUMP HAVING AN INLET, OUTER WALL MEANS CIRCUMSCRIBING SAID INLET AND DIVERVING THEREFROM TO AN OUTER EDGE, AND AN AUXILIARY PUMP MOUNTED WITHIN SAID WALL MEANS IN SPACED RELATION TO SAID INLET OF THE MAIN PUMP, SAID AUXILIARY PUMP HAVING AN AUXILIARY INLET AND INNER WALL MEANS CIRCUMSCRIBING SAID AUXILIARY INLET AND DIVERGING TO AN INNER EDGE SPACED CIRCUMFERENTIALLY INWARD FROM SAID OUTER EDGE.
Claim 2
Dependent Claim
70 words
A PUMPING APPARATUS COMPRISING A MAIN PUMP HAVING AN INLET, OUTER WALL MEANS CIRCUMSCRIBING SAID INLET AND DIVERVING THEREFROM TO AN OUTER EDGE, AND AN AUXILIARY PUMP MOUNTED WITHIN SAID WALL MEANS IN SPACED RELATION TO SAID INLET OF THE MAIN PUMP, SAID AUXILIARY PUMP HAVING AN AUXILIARY INLET AND INNER WALL MEANS CIRCUMSCRIBING SAID AUXILIARY INLET AND DIVERGING TO AN INNER EDGE SPACED CIRCUMFERENTIALLY INWARD FROM SAID OUTER EDGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |