US2976809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump and method of its production
Assignee: Individual
•
Filing: 1955-08-09
•
Granted: 1961-03-28
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 Buschhorn Walther
- 👤 Deutschmann Walter Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D29/02; F04D29/026; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1577886A
Cited
GB285335A
Cited
GB341305A
Cited
US2107260A
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US2190670A
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US2301662A
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US2433589A
Cited
US2347386A
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US2283263A
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US2283348A
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US2343511A
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US2473061A
Cited
US2470563A
Cited
US2764099A
Cited
US2581504A
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US2672821A
Cited
GB719311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |