US3621666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling apparatus and process
Assignee: American Gas Association Inc
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Filing: 1969-11-28
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Granted: 1971-11-23
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Expires: 1989-11-28
Abstract
Abstract Apparatus and process for cooling by contacting a pressurized, heated gas with one face of a non-porous permeable membrane supported on both faces by rigid porous material, passing the gas through the membrane by means of solution therein, evaporating gas from solution in said membrane at the other face of said membrane, the evaporated gas being at a lower temperature and lower pressure than before its passage through the membrane, heat-exchange means being placed on both sides of the membrane.
Inventors
- 👤 Raghunath G Mokadam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:40
CPC Classifications
F; F25; F25B; F25B23/00
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 |