US2674955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating piston pump with valved piston
Assignee: Individual
•
Filing: 1949-04-29
•
Granted: 1954-04-13
•
Expires: 1969-04-29
Abstract
No abstract record available.
Inventors
- 👤 Lewis D Hilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:05
CPC Classifications
F; F04; F04B; F04B47/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1449674A
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US1715121A
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US1563162A
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US1571876A
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US1810121A
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US1983523A
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US2360577A
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US2326902A
Cited
US2417349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |