Azeotropic compositions of methoxy-perfluoropropane and their use
CA 2272574 A1 · Owner: Tuma, Phillip E. · Inventors: Tuma, Phillip E.; Owens, John G.; Yanome, Hideto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides binary azeotropic composition consisting essentially of C3F7-OCH3 and a second component selected from the group consisting of an unsubstituted alkane having 5 to 7 carbon atoms methyl , formate, acetone, methanol, 1,1,1,3,3,3-hexafluoro-2-propanol methylene , chloride and trans-1,2-dichloroethylene. The present invention also discloses tertiary azeotropic composition consisting essentially of C3F7-OCH3 a second , component selected from the group consisting of methanol and 1,1,1,3,3,3hexafluoro-2-propanol and a third component selected from the group consisting of methylene chloride and trans-1,2-dichloroethylene. The azeotropic composition of this …
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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 January 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.