US2975714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw feed centrifugal pump
Assignee: FMC Corp
•
Filing: 1954-11-01
•
Granted: 1961-03-21
•
Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Nechine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/04; F04D7/045; F04D3/00; F04D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH63412A
Cited
GB268572A
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US1791547A
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US2027015A
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US2029766A
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US2343714A
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US2371681A
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US2365058A
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US2458068A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |