US2981199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pumps
Assignee: Becorit Grubenausbau GmbH
•
Filing: 1957-06-26
•
Granted: 1961-04-25
•
Expires: 1977-06-26
Abstract
No abstract record available.
Inventors
- 👤 Weissmann Leon
- 👤 Volpert Ludger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:00
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/042; E; E21; E21D; E21D15/00; E21D15/14; E21D15/44; E21D15/45; F04B7/00; F04B7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1953606A
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US1969920A
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US2134501A
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US2554127A
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US2605613A
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US2685838A
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US2669186A
Cited
FR1082903A
Cited
US2713773A
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US2833221A
Cited
US2751753A
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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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |