Patent US3621667A successfully refreshed from Google Patents.
US3621667A
Expired / Lapsed
US
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Cooling apparatus and process
Assignee: American Gas Association Inc
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Filing: 1969-03-24
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Granted: 1971-11-23
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Expires: 1989-03-24
Abstract
Abstract A high efficiency cooling process and apparatus utilizing a closed fluid refrigerant containing loop having a sequential communication; a liquid pump, a liquid heater, an adiabatic nozzle to obtain supersonic dual phase fluid flow and expansion of the fluid refrigerant to evaporation conditions, a dynamic evaporator for supersonic flow and in thermal exchange relationship with a confined volume to be cooled, a diffuser reducing the velocity of the fluid and increasing the pressure of the fluid to condensation conditions, and a thermal exchanger to condense the fluid to a liquid for recycling.
Inventors
- 👤 Raghunath G Mokadam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:57
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/06; F25B39/00; F25B39/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |