US4482465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon-halocarbon refrigerant blends
Assignee: Phillips Petroleum Co
•
Filing: 1983-03-07
•
Granted: 1984-11-13
•
Expires: 2003-03-07
Abstract
Abstract A refrigeration process is conducted by employing as the refrigerant a mixture of one or more hydrocarbons and one or more halocarbons. The boiling points of the components of the mixture are bracketed in such a manner that the flammability of the mixture is reduced.
Inventors
- 👤 Roy A. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:11
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K2205/00; C09K2205/10; C09K2205/12
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
58 words
A refrigeration process comprising employing as a refrigerant the composition comprising: (a) a first hydrocarbon, (b) a first halocarbon, and (c) a second hydrocarbon; wherein the boiling point of (a) is less than the boiling point of (b); wherein the boiling point of (b) is less than the boiling point of (c); and wherein (b) is substantially nonflammable.
Claim 2
Dependent Claim
58 words
A refrigeration process comprising employing as a refrigerant the composition comprising: (a) a first hydrocarbon, (b) a first halocarbon, and (c) a second hydrocarbon; wherein the boiling point of (a) is less than the boiling point of (b); wherein the boiling point of (b) is less than the boiling point of (c); and wherein (b) is substantially nonflammable.
Claim 3
Dependent Claim
10 words
A process according to claim 1 wherein (b) is fluorocarbon.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein neither the molecular weight of (a) nor the molecular weight of (c) exceeds about 72.
Claim 5
Dependent Claim
35 words
A process according to claim 1 wherein said refrigerant further comprises (d) a second halocarbon; wherein the boiling point of (c) is less than the boiling point of (d); and wherein (d) is substantially nonflammable.
Claim 6
Dependent Claim
35 words
A process according to claim 1 wherein said refrigerant further comprises (d) a second halocarbon; wherein the boiling point of (d) is less than the boiling point of (a); and wherein (d) is substantially nonflammable.
Claim 7
Dependent Claim
56 words
A process according to claim 1 wherein said refrigerant further comprises (d) a second halocarbon and (e) a third halocarbon; wherein the boiling point of (c) is less than the boiling point of (d); wherein the boiling point of (e) is less than the boiling point of (a); and wherein (d) and (e) are substantially nonflammable.
Claim 8
Dependent Claim
17 words
A process according to claim 1 wherein (a) is propane, (b) is dichlorodifluoromethane, and (c) is isobutane.
Claim 9
Dependent Claim
61 words
A process according to claim 7 wherein the amount of isobutane does not exceed about 9 weight percent; wherein the amount of propane does not exceed about 9 weight percent; wherein the total amount of isobutane and propane does not exceed about 12 weight percent; and wherein said weight percentages are based upon the total weight of (a), (b) and (c).
Claim 10
Dependent Claim
61 words
A process according to claim 7 wherein the amount of isobutane does not exceed about 5 weight percent; wherein the amount of propane does not exceed about 5 weight percent; wherein the total amount of isobutane and propane does not exceed about 7 weight percent; and wherein said weight percentages are based upon the total weight of (a), (b) and (c).
Claim 11
Dependent Claim
27 words
A process according to claim 1 wherein the amount of (a), in terms of weight, is about 70 to about 130 percent of the amount of (c).
Claim 12
Dependent Claim
31 words
A process according to claim 10 wherein the total amount of (a) and (b) does not exceed about 12 weight percent based upon the total weight of (a), (b) and (c).
Claim 13
Dependent Claim
17 words
A process according to claim 10 wherein (a) is propane, (b) is dichlorodifluoromethane, and (c) is isobutane.
Claim 14
Dependent Claim
23 words
A process according to claim 12 wherein the amount of propane, in terms of weight, is about equal to the amount of isobutane.
Claim 15
Dependent Claim
32 words
A process according to claim 1 wherein neither the amount of (a) nor the amount of (c) exceeds about 9 weight percent based upon the total weight of (a), (b) and (c).
Claim 16
Dependent Claim
33 words
A process according to claim 1 wherein the total hydrocarbon content of said refrigerant does not exceed about 12 weight percent based upon the total weight of hydrocarbon and halocarbon in said refrigerant.
Claim 17
Dependent Claim
20 words
A process according to claim 4 wherein (a) is propane, (b) is dichlorodifluoromethane, (c) is isobutane and (d) is trichlorofluoromethane.
Claim 18
Dependent Claim
20 words
A process according to claim 4 wherein (a) is propane, (b) is dichlorodifluoromethane, (c) is isobutane and (d) is 1,2-dichloro-1,1,2,2-tetrafluoroethane.
Claim 19
Dependent Claim
62 words
A process according to claim 17 wherein the amount of (a) does not exceed about 9 weight percent; wherein the amount of (c) does not exceed about 9 weight percent; wherein the total amount of (a) and (c) does not exceed about 12 weight percent; and wherein said weight percentages are based upon the total weight of (a), (b), (c) and (d).
Claim 20
Dependent Claim
21 words
A process according to claim 4 wherein the amount of (d) does not exceed about 20 percent by weight of (b).
Claim 21
Dependent Claim
21 words
A process according to claim 5 wherein the amount of (d) does not exceed about 20 percent by weight of (b).
Claim 22
Dependent Claim
25 words
A process according to claim 6 wherein neither the amount of (d) nor the amount of (e) exceeds about 20 percent by weight of (b).
Claim 23
Dependent Claim
60 words
A refrigeration process comprising employing as a refrigerant the composition comprising: (a) a first halocarbon, (b) a first hydrocarbon, and (c) a second halocarbon; wherein the boiling point of (a) is less than the boiling point of (b); wherein the boiling point of (b) is less than the boiling point of (c); and wherein (a) and (c) are substantially nonflammable.
Claim 24
Dependent Claim
60 words
A refrigeration process comprising employing as a refrigerant the composition comprising: (a) a first halocarbon, (b) a first hydrocarbon, and (c) a second halocarbon; wherein the boiling point of (a) is less than the boiling point of (b); wherein the boiling point of (b) is less than the boiling point of (c); and wherein (a) and (c) are substantially nonflammable.
Claim 25
Dependent Claim
19 words
A process according to claim 22 wherein (a) is about 70 to about 130 percent by weight of (c).
Claim 26
Dependent Claim
28 words
A process according to claim 22 wherein the amount of (b) does not exceed about 12 weight percent based upon the total weight of (a), (b) and (c).
Claim 27
Dependent Claim
33 words
A process according to claim 22 wherein the total hydrocarbon content of said refrigerant does not exceed about 12 weight percent based upon the total weight of hydrocarbon and halocarbon in said refrigerant.
Claim 28
Dependent Claim
70 words
A composition comprising: (a) a first hydrocarbon, (b) a first halocarbon, (c) a second hydrocarbon, and (d) a second halocarbon; wherein the boiling point of (a) is less than the boiling point of (b); wherein the boiling point of (b) is less than the boiling point of (c); wherein the boiling point of (c) is less than the boiling point of (d); and wherein (b) and (d) are substantially nonflammable.
Claim 29
Dependent Claim
70 words
A composition comprising: (a) a first hydrocarbon, (b) a first halocarbon, (c) a second hydrocarbon, and (d) a second halocarbon; wherein the boiling point of (a) is less than the boiling point of (b); wherein the boiling point of (b) is less than the boiling point of (c); wherein the boiling point of (c) is less than the boiling point of (d); and wherein (b) and (d) are substantially nonflammable.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |