US2565860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-delivery alternating piston pump
Assignee: Lester Engineering Co
•
Filing: 1945-07-24
•
Granted: 1951-08-28
•
Expires: 1965-07-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:47
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/22; F04C14/223; F04C2/00; F04C2/02; F04C2/063; F04C2/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US498618A
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FR654347A
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FR541344A
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US2096074A
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US2149143A
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US2148282A
Cited
US2426361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |