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US 2003/0197149 A1Published application
Refrigerant composition comprising difluoromethane, 1,1,1,-trifluoroethane and 1,1,1,2-tetrafluoroethane
AssigneeKorea Institute of Science and Technology
InventorsByung-Gwon Lee, Jong-Sung Lim, Byoung Sung Ahn, Kun You Park, Chang-Nyeon Kim
Life of this patent
Estimating the term…
Abstract
A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2-tetrafluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1-difluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.
Claims6
A refrigerant composition comprising:
- (a) a first constituent of difluoromethane,
- (b) a second constituent of 1,1,1-trifluoroethane,
- (c) a third constituent of 1,1,1,2-tetrafluoroethane, and
- (d) a fourth constituent selected from the group consisting of 1,1-difluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.
1 more element
Dependencies are inferred from the claim text.