Process for the fluorination of perchloroethylene or pentachloroethane
CA 2113510 C · Owner: Lacroix, Eric · Inventors: Lantz, Andre; Cheminal, Bernard; Lacroix, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to gas-phase catalytic fluorination of perchlorethylene or pentachlorethane using hydrofluoric acid. A mixed catalyst is used consisting of nickel and chromium oxides halides and/or oxyhalides, deposited on a support comprising aluminium fluoride or a mixture of aluminium fluoride and alumina the said catalyst being previously activated by drying and by fluorination with hydrofluoric acid.
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 January 14, 1994 and granted January 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2016.
- 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.