Patent US3153225A successfully refreshed from Google Patents.
US2993348A
Expired / Lapsed
US
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Pressure and temperature responsive pilot valve for refrigeration systems
Assignee: Hubbell Inc
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Filing: 1956-08-23
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Granted: 1961-07-25
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 John R Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733865A
Cited
US2046894A
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US2097539A
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US2053365A
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US2401144A
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US2505933A
Cited
US2504689A
Cited
US2759674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |