Is r422d patented in China?

Go to zhuanzhihui.com Patent Exchange Platform and query R422d. Only one patent is found:

Composition containing 2,3,3,3-tetrafluoropropene and hydrocarbon and use right thereof

ApplicationNo.: 200980 146232.5 Application Date: 2009-1-18.

Abstract: The invention relates to a composition for refrigeration, air conditioning and heat pump systems, wherein the composition comprises 2,3,3,3-tetrafluoropropene (HFC- 1234yf) and at least one hydrocarbon. The composition of the present invention can be used as heat transfer fluid, foam foaming agent and aerosol propellant in refrigeration or heating methods.

Applicant:? Namur DuPont co.

Address:? Delaware, USA

Inventor (designer):? B H minor? T.J. Lake, D.B. Bivens? A. About Kosek