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Patent US2797875A successfully refreshed from Google Patents.
US2797875A
Expired / Lapsed
US
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Thermal sensing car heater valve
Assignee: Dole Valve Co
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Filing: 1955-04-11
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Granted: 1957-07-02
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Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Frank E Obermaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/52; B; B60; B60H; B60H1/00; B60H1/00485; G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1306; G05D23/132
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |