US4687588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant mixture of trichlorofluoromethane and dichlorohexafluoropropane
Assignee: Calmac Manufacturing Corp
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Filing: 1986-08-05
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Granted: 1987-08-18
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Expires: 2006-08-05
Abstract
Abstract A refrigerant mixture consisting essentially of trichlorofluoromethane (R-11) and dichlorohexafluoropropane (R-216) which has a higher saturated vapor density than that of pure R-11 and which exhibits an azeotrope at approximately 74% by weight of R-11 and 26% by weight of R-216.
Inventors
- 👤 Mark O. McLinden
- 👤 David A. Didion
- 👤 Calvin D. MacCracken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:21
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
23 words
A mixture consisting essentially of trichlorofluoromethane (R-11) and dichlorohexafluoropropane (R-216) and which has a higher saturated vapor density than that of pure R-11.
Claim 2
Dependent Claim
23 words
A mixture consisting essentially of trichlorofluoromethane (R-11) and dichlorohexafluoropropane (R-216) and which has a higher saturated vapor density than that of pure R-11.
Claim 3
Dependent Claim
17 words
A mixture consisting essentially of 1% to 93% by weight dichlorohexafluoropropane (R-216) and the remainder trichlorofluoromethane R-11.
Claim 4
Dependent Claim
17 words
A mixture consisting essentially of 1% to 93% by weight dichlorohexafluoropropane (R-216) and the remainder trichlorofluoromethane R-11.
Claim 5
Dependent Claim
29 words
A mixture consisting essentially of about 50% to 95% by weight of trichlorofluoromethane (R-11) and about 5% to 50% by weight of dichlorohexafluoropropane (R-216) and which is substantially azeotropic.
Claim 6
Dependent Claim
29 words
A mixture consisting essentially of about 50% to 95% by weight of trichlorofluoromethane (R-11) and about 5% to 50% by weight of dichlorohexafluoropropane (R-216) and which is substantially azeotropic.
Claim 7
Dependent Claim
24 words
A mixture according to claim 3 consisting essentially of about 74% by weight of trichlorofluoromethane (R-11) and about 26% by weight of dichlorohexafluoropropane (R-216).
Claim 8
Independent Claim
38 words
A method of achieving a higher lift in a centrifugal-type compressor which comprises evaporating a mixture consisting essentially of trichlorofluoromethane (R-11) and dichlorohexafluoropropane (R-216) and which mixture has a higher saturated vapor density than that of pure R-11.
Claim 9
Independent Claim
38 words
A method of achieving a higher lift in a centrifugal-type compressor which comprises evaporating a mixture consisting essentially of trichlorofluoromethane (R-11) and dichlorohexafluoropropane (R-216) and which mixture has a higher saturated vapor density than that of pure R-11.
Claim 10
Dependent Claim
24 words
A method according to claim 5 wherein the mixture consists essentially of 1% to 93% by weight dichlorohexafluoropropane (R-216) and the remainder trichlorofluoromethane (R-11).
Claim 11
Dependent Claim
31 words
A method according to claim 5 wherein the mixture consists essentially of about 50% to 95% by weight of trichlorofluoromethane (R-11) and about 5% to 50% by weight of dichlorohexafluropropane (R-216).
Claim 12
Dependent Claim
27 words
A method according to claim 5 wherein the mixture consists essentially of about 74% by weight of trichlorofluormethane (R-11) and about 26% by weight of dichlorohexafluoropropane (R-216).
References Cited (Backward Citations)
US4344292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |