US3321929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling system
Assignee: Carrier Corp
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Filing: 1965-07-08
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Granted: 1967-05-30
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Expires: 1985-07-08
Abstract
No abstract record available.
Inventors
- 👤 Philip F Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:44
CPC Classifications
F; F25; F25B; F25B7/00; F24; F24F; F24F5/00; F25B29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A HEATING AND COOLING SYSTEM COMPRISING FIRST REFRIGERATING MEANS HAVING A FIRST CENTRIFUGAL COMPRESSOR FOR CIRCULATING A REFRIGERANT TO COOL A LOAD AND HAVING FIRST REFRIGERANT CONDENSER MEANS IN CIRCUIT WITH SAID COMPRESSOR FOR REJECTING THE HEAT EVOLVED THEREIN TO CONDENSING WATER CIRCULATED THROUGH SAID CONDENSER MEANS, SECOND REFRIGERATING MEANS FOR HEATING A LOAD AND INCLUDING, EVAPORATOR MEANS FOR RECEIVING SAID CONDENSING WATER AND TRANSFERRING HEAT THEREFROM TO REFRIGERANT CIRCULATED THROUGH SAID EVAPORATOR MEANS, A SECOND CENTRIFUGAL COMPRESSOR IN CIRCUIT WITH SAID EVAPORATOR FOR CIRCULATING REFRIGERANT THROUGH SAID EVAPORATOR TO RECEIVE HEAT FROM SAID CONDENSING WATER CIRCULATED THROUGH SAID EVAPORATOR AND FOR INCREASING THE TEMPERATURE OF SAID REFRIGERANT ABOVE THE TEMPERATURE OF SAID CONDENSING WATER, AND CONDENSING MEANS IN CIRCUIT WITH SAID SECOND CENTRIFUGAL COMPRESSOR FOR RECEIVING SAID REFRIGERANT FROM SAID SECOND COMPRESSOR AND TRANSFERRING HEAT FROM THE LAST SAID REFRIGERANT TO FLUID CIRCULATED THROUGH SAID CONDENSING MEANS, MEANS FOR PASSING SAID FLUID TO THE LOAD TO BE HEATED AND HEATING THE LOAD WITH
Claim 2
Dependent Claim
164 words
A HEATING AND COOLING SYSTEM COMPRISING FIRST REFRIGERATING MEANS HAVING A FIRST CENTRIFUGAL COMPRESSOR FOR CIRCULATING A REFRIGERANT TO COOL A LOAD AND HAVING FIRST REFRIGERANT CONDENSER MEANS IN CIRCUIT WITH SAID COMPRESSOR FOR REJECTING THE HEAT EVOLVED THEREIN TO CONDENSING WATER CIRCULATED THROUGH SAID CONDENSER MEANS, SECOND REFRIGERATING MEANS FOR HEATING A LOAD AND INCLUDING, EVAPORATOR MEANS FOR RECEIVING SAID CONDENSING WATER AND TRANSFERRING HEAT THEREFROM TO REFRIGERANT CIRCULATED THROUGH SAID EVAPORATOR MEANS, A SECOND CENTRIFUGAL COMPRESSOR IN CIRCUIT WITH SAID EVAPORATOR FOR CIRCULATING REFRIGERANT THROUGH SAID EVAPORATOR TO RECEIVE HEAT FROM SAID CONDENSING WATER CIRCULATED THROUGH SAID EVAPORATOR AND FOR INCREASING THE TEMPERATURE OF SAID REFRIGERANT ABOVE THE TEMPERATURE OF SAID CONDENSING WATER, AND CONDENSING MEANS IN CIRCUIT WITH SAID SECOND CENTRIFUGAL COMPRESSOR FOR RECEIVING SAID REFRIGERANT FROM SAID SECOND COMPRESSOR AND TRANSFERRING HEAT FROM THE LAST SAID REFRIGERANT TO FLUID CIRCULATED THROUGH SAID CONDENSING MEANS, MEANS FOR PASSING SAID FLUID TO THE LOAD TO BE HEATED AND HEATING THE LOAD WITH
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |