Patent US3135317A successfully refreshed from Google Patents.
US3135317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump and means for defrosting the outside coils thereof
Assignee: Individual
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Filing: 1960-03-10
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Granted: 1964-06-02
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Expires: 1980-03-10
Abstract
No abstract record available.
Inventors
- 👤 William H Goettl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:23
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A HEAT PUMP AND MEANS FOR ALLEVIATING FROSTING THEREOF THE COMBINATION OF: A HEAT PUMP HAVING INSIDE AND OUTSIDE COILS; A COMPRESSOR; A REVERSING VALVE COUPLED THERETO AND PERMITTING A REVERSAL OF THE FLOW OF GAS RELATIVE TO SAID INSIDE AND OUTSIDE COILS; FLOW PASSAGE MEANS CONNECTING SAID COILS, REVERSING VALVE AND COMPRESSOR;
Claim 2
Dependent Claim
54 words
IN A HEAT PUMP AND MEANS FOR ALLEVIATING FROSTING THEREOF THE COMBINATION OF: A HEAT PUMP HAVING INSIDE AND OUTSIDE COILS; A COMPRESSOR; A REVERSING VALVE COUPLED THERETO AND PERMITTING A REVERSAL OF THE FLOW OF GAS RELATIVE TO SAID INSIDE AND OUTSIDE COILS; FLOW PASSAGE MEANS CONNECTING SAID COILS, REVERSING VALVE AND COMPRESSOR;
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |