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Patent US2572175A successfully refreshed from Google Patents.
US2572175A
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Valve operator
Assignee: Skinner Chuck Co
•
Filing: 1945-06-06
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Granted: 1951-10-23
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Expires: 1965-06-06
Abstract
No abstract record available.
Inventors
- 👤 Hal W Mcpherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:28
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1767201A
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US2054909A
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US2117096A
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US2216855A
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US2263819A
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US2292477A
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US2289456A
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US2388868A
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US2358828A
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US2382664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |