Patent DE64798C successfully refreshed from Google Patents.
US2811167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot operated shutoff valve
Assignee: Parker Appliance Co
•
Filing: 1952-05-05
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Granted: 1957-10-29
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Expires: 1972-05-05
Abstract
No abstract record available.
Inventors
- 👤 William J Bott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:33
CPC Classifications
G; G05; G05D; G05D9/00; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1269721A
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US1871044A
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US2388868A
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US2698631A
Cited
US2619108A
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US2683580A
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US2712828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |