Process for producing a dichloropentafluoropropane
CA 2034479 A1 · Owner: Ohmori, Takashi · Inventors: Samejima, Shunichi; Morikawa, Shinsuke; Ohnishi, Keiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a dichloropentafluoropropane which comprises subjecting CF2-CF2 and CC?3X (where X is C?, F or H) to an addition reaction and reducing, and/or fluorinating the resulting C3C?3F4X to obtain C3C?2F5H.
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 July 18, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.