Production of compounds comprising the group cf3
CA 2462410 A1 · Owner: Braun, Max · Inventors: Braun, Max; Brosch, Carsten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It has been discovered that highly fluorinated antimony especially as a , hydrogen fluoride addition compound can be used as an isomerisation catalyst for the isomerisation of certain halogen(hydro)carbon compounds. For example 1,1,1-trifluoro-2,2-dichloroethane can be produced from 1,1,2-trifluoro-1,2dichloroethane. The method is also suitable for the purification of certain (hydro)carbon compounds which are contaminated by isomerisable compounds.
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 August 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2024.
- 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.