US2781979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermo-magnetic refrigerant valve
Assignee: Dole Valve Co
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Filing: 1955-07-13
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Granted: 1957-02-19
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Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 El Roy J Kraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:56
CPC Classifications
F; F25; F25B; F25B25/00; F25B25/005; G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; G05D23/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |