US2913994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump having pump pistons and means for collapsing the pump pistons
Assignee: Koehring Co
•
Filing: 1955-11-16
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Granted: 1959-11-24
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Howard M Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:46
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/122; F04B1/124; F04B1/126; F04B1/2014; F04B1/2064; F04B1/22; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/106; F04B49/00; F04B49/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2377227A
Cited
US2439668A
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US2437887A
Cited
US2459786A
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US2617360A
Cited
US2577242A
Cited
US2675830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |