US3431865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump with concentric valve means
Assignee: Hypro LLC
•
Filing: 1966-04-21
•
Granted: 1969-03-11
•
Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest E Cook
- 👤 Ramon Pareja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:33
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/109; F04B1/00; F04B1/04; F04B1/0404; F04B1/0426; F04B1/053; F04B53/102; F04B53/103; F04B53/1032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US986122A
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US1620524A
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US947536A
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DE349479C
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US1407518A
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US1901478A
Cited
GB611057A
Cited
US2668004A
Cited
US2801596A
Cited
US3238890A
Cited
US3146194A
Cited
US3174436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |