US3324671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration systems
Assignee: Westinghouse Electric Corp
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Filing: 1966-04-19
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Granted: 1967-06-13
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Expires: 1986-04-19
Abstract
No abstract record available.
Inventors
- 👤 James R Harnish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:22
CPC Classifications
F; F25; F25B; F25B13/00; F25B2400/00; F25B2400/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
158 words
A HEAT PUMP COMPRISING A REFRIGERANT COMPRESSOR, AN OUTDOOR HEAT EXCHANGER, AN INDOOR HEAT EXCHANGER, REFRIGERANT EXPANSION MEANS, A RECEIVER HEAT EXCHANGER, MEANS WHEN COOLING IS REQUIRED FOR ROUTING REFRIGERANT FROM THE DISCHARGE SIDE OF SAID COMPRESSOR THROUGH SAID OUTDOOR HEAT EXCHANGER OPERATING AS A CONDENSOR, SAID EXPANSION MEANS, SAID INDOOR HEAT EXCHANGER OPERATING AS AN EVAPORATOR, AND SAID RECEIVER HEAT EXCHANGER TO THE SUCTION SIDE OF SAID COMPRESSOR, AND WHEN HEATING IS REQUIRED FOR ROUTING REFRIGERANT FROM SAID DISCHARGE SIDE OF SAID COMPRESSOR THROUGH SAID INDOOR HEAT EXCHANGER OPERATING AS A CONDENSER, SAID EXPANSION MEANS, SAID OUTDOOR HEAT EXCHANGER OPERATING AS AN EVAPORATOR, AND SAID RECEIVER HEAT EXCHANGER TO SAID SUCTION SIDE OF SAID COMPRESSOR, A RECEIVER, SAID RECEIVER HEAT EXCHANGER BEING ARRANGED TO CHANGE THE TEMPERATURE OF REFRIGERANT WITHIN SAID RECEIVER, AND MEANS CONNECTING THE INTERIOR OF SAID RECEIVER TO THE REFRIGERANT INELT OF SAID INDOOR HEAT EXCHANGER WHEN THE LATTER IS OPERATING AS AN EVAPORATOR,
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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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |