Patent US4578748A successfully refreshed from Google Patents.
Patent US3139924A successfully refreshed from Google Patents.
US3139924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine driven heat pump
Assignee: I C E D Inc
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Filing: 1960-12-08
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Granted: 1964-07-07
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Expires: 1980-12-08
Abstract
No abstract record available.
Inventors
- 👤 Earl F Schreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:35
CPC Classifications
F; F25; F25B; F25B27/00; F25B13/00; F25B47/00; F25B47/006; F25D; F25D21/00; F25D21/06; F25D21/12; F25D2323/00; F25D2323/002; F25D2323/0028; F25D2323/00283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A REFRIGERATING SYSTEM INCLUDING A REFRIGERANT COMPRESSOR, FIRST AND SECOND HEAT EXCHANGERS CONNECTED WITH SAID COMPRESSOR IN A REFRIGERANT CIRCUIT AND ADAPTED TO SERVE EITHER AS A CONDENSER OR EVAPORATOR, AN ENGINE FOR DRIVING SAID COMPRESSOR, VALVE MEANS TO SELECTIVELY REVERSE THE ORDER OF FLOW OF REFRIGERANT FROM THE DISCHARGE OF SAID COMPRESSOR THROUGH SAID FIRST AND SECOND HEAT EXCHANGERS WHEREBY ONE EXCHANGER SERVES AS A REFRIGERANT CONDENSER WHILE THE OTHER EXCHANGER SERVES AS A REFRIGERANT EVAPORATOR AND VICE VERSA, MEANS FORMING AN AIR FLOW PATH INCLUDING THEREIN SAID COMPRESSOR, ENGINE AND SAID FIRST HEAT EXCHANGER, SAID FIRST EXCHANGER BEING AT ONE END OF SAID PATH, AND MEANS FOR FORCING AIR SELECTIVELY IN
Claim 2
Dependent Claim
114 words
IN A REFRIGERATING SYSTEM INCLUDING A REFRIGERANT COMPRESSOR, FIRST AND SECOND HEAT EXCHANGERS CONNECTED WITH SAID COMPRESSOR IN A REFRIGERANT CIRCUIT AND ADAPTED TO SERVE EITHER AS A CONDENSER OR EVAPORATOR, AN ENGINE FOR DRIVING SAID COMPRESSOR, VALVE MEANS TO SELECTIVELY REVERSE THE ORDER OF FLOW OF REFRIGERANT FROM THE DISCHARGE OF SAID COMPRESSOR THROUGH SAID FIRST AND SECOND HEAT EXCHANGERS WHEREBY ONE EXCHANGER SERVES AS A REFRIGERANT CONDENSER WHILE THE OTHER EXCHANGER SERVES AS A REFRIGERANT EVAPORATOR AND VICE VERSA, MEANS FORMING AN AIR FLOW PATH INCLUDING THEREIN SAID COMPRESSOR, ENGINE AND SAID FIRST HEAT EXCHANGER, SAID FIRST EXCHANGER BEING AT ONE END OF SAID PATH, AND MEANS FOR FORCING AIR SELECTIVELY IN
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |