Canadian application, no grantCanada
Compositions useful as refrigerants
CA 2126187 A1 · Owner: Powell, Richard Llewellyn · Inventors: Powell, Richard Llewellyn; Morrison, James David
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A refrigerant composition comprising a mixture of difluoromethyl trifluoromethyl ether and at least one hydrofluoroalkane selected from difluoromethane, pentafluoroethane and 1,1,1-trifluoroethane is claimed.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 23, 1992
GrantedNo grant recorded
Term endedDecember 23, 2012
Patent numberCA 2126187 A1
Classification (IPC)C09K5/04
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.