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Class Information
Number: 252/67
Name: Compositions > Vaporization, or expansion, refrigeration or heat or energy exchange
Description: Compositions specialized and designed for, or peculiar to, use in producing refrigeration, or heat or energy exchange, by operations that include vaporization, or expansion or compression, of a substance or of materials containing the same.










Sub-classes under this class:

Class Number Class Name Patents
252/69 With low-volatile solvent or absorbent 195
252/68 With lubricants, or warning, stabilizing or anti-corrosion agents or persistent gases 630


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Patent Number Title Of Patent Date Issued
8709275 Hydrofluorocarbon refrigerant compositions for heat pump water heaters Apr. 29, 2014
8709303 Dielectric insulation medium Apr. 29, 2014
8703006 Azeotrope-like compositions comprising 1-chloro-3,3,3-trifluoropropene Apr. 22, 2014
8703690 Use of R-1233 in liquid chillers Apr. 22, 2014
8691107 Stabilized hydrochlorofluoroolefins and hydrofluoroolefins Apr. 8, 2014
8692037 Compositions comprising 1,1,1,2,3-pentafluoropropane or 2,3,3,3-tetrafluoropropene Apr. 8, 2014
8691108 Refrigeration apparatus Apr. 8, 2014
8679363 Refrigerant for high-temperature heat transfer Mar. 25, 2014
8680037 Azeotropic and azeotrope-like compositions of Z-1,1,1,4,4,4-hexafluoro-2-butene and ethanol Mar. 25, 2014
8652348 Drop in refrigerant blend for mineral oil based systems Feb. 18, 2014
8628681 Heat transfer compositions Jan. 14, 2014
8623233 Azeotropic and azeotrope-like compositions of Z-1,1,1,4,4,4-hexafluoro-2-butene, trans-1,2-dichloroethylene, and 1,1,1,3,3-pentafluorobutane Jan. 7, 2014
8623808 Compositions containing tetrafluoropropene and carbon dioxide Jan. 7, 2014
8618040 Solvent compositions containing chlorofluoroolefins or fluoroolefins Dec. 31, 2013
8598107 Azeotrope-like compositions of pentafluoroethane and trifluoroiodomethane Dec. 3, 2013
8591761 Apparatus including hydrofluoroether with high temperature stability and uses thereof Nov. 26, 2013
8586798 Heat transfer medium, phosphonium ionic liquids, and methods of making Nov. 19, 2013
8580137 Trans-1,2-dichloroethylene with flash point elevated by 1-chloro-3,3,3-trifluoropropene Nov. 12, 2013
8574451 Trans-chloro-3,3,3-trifluoropropene for use in chiller applications Nov. 5, 2013
8562853 Tracer-containing compositions Oct. 22, 2013
8557135 Azeotrope and azeotrope-like composition of 2,3,3,3-tetrafluoropropene and ammonia Oct. 15, 2013
8557136 Azeotrope and azeotrope-like compositions of 1-chloro-3,3,3-trifluoropropene and HCFC-123 Oct. 15, 2013
8551354 Refrigerant composition Oct. 8, 2013
8535555 Epoxide and fluorinated epoxide stabilizers for fluoroolefins Sep. 17, 2013
8535556 Compositions comprising iodotrifluoromethane and stabilizers Sep. 17, 2013
8524110 Compositions comprising a fluoroolefin Sep. 3, 2013
8518293 1,3,3,3-tetrafluoropropene process azeotropes with HF Aug. 27, 2013
8518294 Compositions comprising 2,3,3,3-tetrafluoropropene, 2-chloro-2,3,3,3-tetrafluoropropanol, 2-chloro-2,3,3,3-tetrafluoro-propyl acetate or zinc (2-chloro-2,3,3,3-tetrafluoropropdxy) chloride Aug. 27, 2013
8512592 Heat-dissipating compositions comprising estolide compounds Aug. 20, 2013
8512591 Heat transfer compositions Aug. 20, 2013
8506839 Absorption cycle utilizing ionic liquids and water as working fluids Aug. 13, 2013
8496845 Refrigerant composition comprising difluoromethane (HFC32), pentafluoroethane (HFC125) and 2, 3, 3, 3-tetrafluoropropene (HFO1234yf) Jul. 30, 2013
8496846 Phenol stabilizers for fluoroolefins Jul. 30, 2013
8497401 Azeotrope-like compositions of pentafluoropropane, chlorotrifluoropropene, and hyrdrogen fluoride Jul. 30, 2013
8492327 Azeotrope-like compositions of difluoromethane and trifluoroiodomethane Jul. 23, 2013
8490416 Method of cooling a metal strip traveling through a cooling section of a continuous heat treatment line, and an installation for implementing said method Jul. 23, 2013
8486293 Hydrogen fluoride-HFC-254eb azeotrope and its uses Jul. 16, 2013
8486294 Hydrofluoroolefin compositions Jul. 16, 2013
8486295 Alkyl perfluoroalkene ethers and uses thereof Jul. 16, 2013
8465665 Refrigerating-machine oil composition, and compressor for refrigerating machine and refrigerating apparatus each employing the same Jun. 18, 2013
8465664 Refrigerant composition Jun. 18, 2013
8444873 Refrigerant composition May. 21, 2013
8425795 Compositions comprising fluoroolefins and uses thereof Apr. 23, 2013
8420585 Azeotropic compositions comprising fluorinated compounds for cleaning applications Apr. 16, 2013
8402778 Method for enhancing mineral oil miscibility and oil return Mar. 26, 2013
8398882 Processes for the production of fluoropropanes and halopropenes and azeotropic compositions of 2-chloro-3,3,3-trifluoro-1-propene with HF and of 1,1,1,2,2-pentafluoropropane with HF Mar. 19, 2013
8398881 Refrigerating machine oil composition Mar. 19, 2013
8394287 Non-aqueous heat transfer fluid and use thereof Mar. 12, 2013
8394286 Thiol and thioether stabilizers for fluoroolefins Mar. 12, 2013
8388857 Stabilized hydrochlorofluoroolefins and hydrofluoroolefins Mar. 5, 2013

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