Patent US2521566A successfully refreshed from Google Patents.
US2521566A
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Fluid operated reciprocating motor with rotary reversing valve
Assignee: Marquette Metal Products Co
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Filing: 1946-05-09
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Granted: 1950-09-05
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Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Leroy J Carey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US647351A
Cited
GB243774A
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US2060684A
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US1798520A
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US1853758A
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US1834607A
Cited
US2268898A
Cited
US2235544A
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US2297381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |