R22 replacement refrigerant
US8999191B2 · kind B2 · utility
1Cited by
34References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Mar 22, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2205/43
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Refrigerant compositions are disclosed which includes (a) 57-59 total wt % pentafluoroethane (R125); (b) 38-41 total wt % 1,1,1,2-tetrafluoroethane (R134a); and (c) 2.5-2.9 total wt % isobutane. More preferably, the invention is a refrigerant formulation containing a nominal composition consisting of 58.0% R125, 39.3% R134a and 2.7% R600a, subject only to the normal variations in concentrations experienced with charging and mixing refrigerants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.