Patent US3049140A successfully refreshed from Google Patents.
US3049140A
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Automatic high-low pressure cut-off valve
Assignee: Thornhill Craver Co
•
Filing: 1959-05-18
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Granted: 1962-08-14
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Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Charles W Thornhill
- 👤 George D Hall
- 👤 Obert L Nordin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:55
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1654; Y10T137/1684; Y10T137/1692; Y10T137/1714; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/7729; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2019193A
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US2693819A
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US2910050A
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US2812775A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |