Patent US3553977A successfully refreshed from Google Patents.
US3553977A
Expired / Lapsed
US
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Absorption refrigeration apparatus including means cooling strong absorption solution
Assignee: Trane US Inc
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Filing: 1968-11-05
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Granted: 1971-01-12
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Expires: 1988-11-05
Abstract
Abstract ABSORPTION REFRIGERATION APPARATUS EMPLOYING A PUMP FOR CIRCULATING ABSORBENT SOLUTION WHICH IS AT A TEMPERATURE AND PRESSURE NEAR ITS FLASH POINT IN WHICH A HEAT EXCHANGER IS PROVIDED TO REDUCE THE TEMPERATURE OF THE SOLUTION PRIOR TO ITS FLOW TO THE PUMP THUS PREVENTING FLASHING OF THE SOLUTION AS THE PRESSURE IS REDUCED AT THE INLET OF THE PUMP.
Inventors
- 👤 John L M Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:52
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B2315/00; F25B2315/001; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |