Patent US2728622A successfully refreshed from Google Patents.
Patent US3074249A successfully refreshed from Google Patents.
US3074249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system and apparatus having a heating cycle and a cooling cycle
Assignee: Individual
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Filing: 1960-06-15
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Granted: 1963-01-22
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Expires: 1980-06-15
Abstract
No abstract record available.
Inventors
- 👤 Ray M Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:36
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/10; F25B13/00; F25B31/00; F25B31/006; F25B49/00; F25B49/02; F25B49/022; F25B2400/00; F25B2400/07; F25B2400/075; F25B2600/00; F25B2600/02; F25B2600/025; F25B2600/0253; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A REFRIGERATION APPARATUS ADAPTED TO BE USED FOR HEATING AN ENCLOSURE, COMPRISING A CONDENSER ADAPTED TO CONDENSE REFRIGERANT FOR TRANSFERRING HEAT TO THE ENCLOSURE, AN EVAPORATOR FOR EVAPORATING REFRIGERANT FOR TAKING UP HEAT, FLOW LINES CONNECTING SAID CONDENSER TO SAID EVAPORATOR FOR THE FLOW OF REFRIGERANT FROM SAID CONDENSER TO SAID EVAPORATOR AND FOR CONNECTING SAID EVAPORATOR TO SAID CONDENSER FOR THE FLOW OF REFRIGERANT FROM SAID EVAPORATOR TO SAID CONDENSER TO THEREBY PROVIDE A CLOSED REFRIGERATION CIRCUIT, A PLURALITY OF COMPRESSORS CONNECTED IN THE FLOW LINE FROM SAID EVAPORATOR TO SAID CONDENSER, A RECEIVER CONNECTED INTERMEDIATE SAID COMPRESSORS, AND MEANS FOR CONTROLLING THE LEVEL OF THE LIQUID REFRIGERANT IN SAID EVAPORATOR IN RESPONSE TO THE DEMAND FOR HEAT FROM SAID CONDENSER.
Claim 2
Dependent Claim
122 words
A REFRIGERATION APPARATUS ADAPTED TO BE USED FOR HEATING AN ENCLOSURE, COMPRISING A CONDENSER ADAPTED TO CONDENSE REFRIGERANT FOR TRANSFERRING HEAT TO THE ENCLOSURE, AN EVAPORATOR FOR EVAPORATING REFRIGERANT FOR TAKING UP HEAT, FLOW LINES CONNECTING SAID CONDENSER TO SAID EVAPORATOR FOR THE FLOW OF REFRIGERANT FROM SAID CONDENSER TO SAID EVAPORATOR AND FOR CONNECTING SAID EVAPORATOR TO SAID CONDENSER FOR THE FLOW OF REFRIGERANT FROM SAID EVAPORATOR TO SAID CONDENSER TO THEREBY PROVIDE A CLOSED REFRIGERATION CIRCUIT, A PLURALITY OF COMPRESSORS CONNECTED IN THE FLOW LINE FROM SAID EVAPORATOR TO SAID CONDENSER, A RECEIVER CONNECTED INTERMEDIATE SAID COMPRESSORS, AND MEANS FOR CONTROLLING THE LEVEL OF THE LIQUID REFRIGERANT IN SAID EVAPORATOR IN RESPONSE TO THE DEMAND FOR HEAT FROM SAID CONDENSER.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |