US4559154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pumps
Assignee: Imperial Chemical Industries Ltd
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Filing: 1984-07-31
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Granted: 1985-12-17
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Expires: 2004-07-31
Abstract
Abstract An absorption heat pump system wherein the working fluid is a saturated fluorohydrocarbon or fluorohydrocarbon ether having from 3 to 5 carbon atoms.
Inventors
- 👤 Richard L. Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:23
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/047
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
50 words
An absorption heat pump wherein the working fluid is a saturated fluorohydrocarbon or fluorohydrocarbon ether having from 3 to 5 carbon atoms and the solvent is a compound of the formula: ##STR4## wherein each of Q 1 and Q 2 , independently, represents hydrogen or a C 1-4 alkyl radical.
Claim 2
Dependent Claim
50 words
An absorption heat pump wherein the working fluid is a saturated fluorohydrocarbon or fluorohydrocarbon ether having from 3 to 5 carbon atoms and the solvent is a compound of the formula: ##STR4## wherein each of Q 1 and Q 2 , independently, represents hydrogen or a C 1-4 alkyl radical.
Claim 3
Dependent Claim
19 words
An absorption heat pump according to claim 1 in which each of Q 1 and Q 2 is methyl.
References Cited (Backward Citations)
US2035541A
Cited
US3362180A
Cited
US3689459A
Cited
US4104314A
Cited
US4054036A
Cited
US4454052A
Cited
US4482465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |