Patent US3852950A successfully refreshed from Google Patents.
Patent US3153442A successfully refreshed from Google Patents.
US3153442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and air conditioning apparatus
Assignee: Individual
•
Filing: 1961-06-26
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Granted: 1964-10-20
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 David H Silvern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:03
CPC Classifications
F; F25; F25B; F25B11/00; F24; F24F; F24F5/00; F25B2400/00; F25B2400/13; F25B2400/23; Y; Y10; Y10S; Y10S280/00; Y10S280/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A HEATING AND COOLING APPARATUS COMPRISING: AN EVAPORATOR, A FLUID COMPRESSOR, A PRIME MOVER CONNECTED TO SAID COMPRESSOR, A HEAT SOURCE, A FIRST CONDUIT CIRCUIT COUPLED TO SAID HEAT SOURCE AND SAID EVAPORATOR, SAID FIRST CONDUIT CIRCUIT INCLUDING VALVE MEANS FOR SELECTIVELY INTERCONNECTING SAID HEAT SOURCE AND SAID EVAPORATOR, A HEATING FLUID CONDUCTED BY SAID FIRST CONDUIT CIRCUIT, A SECOND CONDUIT CIRCUIT COUPLED TO SAID HEAT SOURCE AND SAID PRIME MOVER, SAID SECOND CONDUIT CIRCUIT INCLUDING VALVE MEANS FOR SELECTIVELY INTERCONNECTING SAID HEAT SOURCE TO SAID PRIME MOVER FOR DRIVING SAID PRIME MOVER, SAID HEATING FLUID BEING SELECTIVELY CONDUCTED TO SAID PRIME MOVER BY SAID SECOND CONDUIT CIRCUIT, A THIRD CONDUIT CIRCUIT COUPLED TO SAID COMPRESSOR AND SAID EVAPORATOR, SAID THIRD CONDUIT CIRCUIT INCLUDING VALVE MEANS FOR SELECTIVELY INTERCONNECTING SAID COMPRESSOR AND SAID EVAPO-
Claim 2
Dependent Claim
134 words
A HEATING AND COOLING APPARATUS COMPRISING: AN EVAPORATOR, A FLUID COMPRESSOR, A PRIME MOVER CONNECTED TO SAID COMPRESSOR, A HEAT SOURCE, A FIRST CONDUIT CIRCUIT COUPLED TO SAID HEAT SOURCE AND SAID EVAPORATOR, SAID FIRST CONDUIT CIRCUIT INCLUDING VALVE MEANS FOR SELECTIVELY INTERCONNECTING SAID HEAT SOURCE AND SAID EVAPORATOR, A HEATING FLUID CONDUCTED BY SAID FIRST CONDUIT CIRCUIT, A SECOND CONDUIT CIRCUIT COUPLED TO SAID HEAT SOURCE AND SAID PRIME MOVER, SAID SECOND CONDUIT CIRCUIT INCLUDING VALVE MEANS FOR SELECTIVELY INTERCONNECTING SAID HEAT SOURCE TO SAID PRIME MOVER FOR DRIVING SAID PRIME MOVER, SAID HEATING FLUID BEING SELECTIVELY CONDUCTED TO SAID PRIME MOVER BY SAID SECOND CONDUIT CIRCUIT, A THIRD CONDUIT CIRCUIT COUPLED TO SAID COMPRESSOR AND SAID EVAPORATOR, SAID THIRD CONDUIT CIRCUIT INCLUDING VALVE MEANS FOR SELECTIVELY INTERCONNECTING SAID COMPRESSOR AND SAID EVAPO-
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) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |