Process for the preparation of fluoroalkyl perfluorovinyl ethers
CA 1304415 C · Owner: Pontevivo, Michele · Inventors: Bornengo, Giorgio; Modena, Silvana; Marraccini, Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case T 3558), PROCESS FOR THE PREPARATION OF FLUOROALKYL PERFLUOROVINYL ETHERS, Abstract of the Disclosure A process for the preparation of fluoroalkyl ethers of the formula:, (I), wherein:, Y is Br or F; X is F, Cl or Br or their mixtures when n is equal to or higher than 2;, n is within the range of from 0 to 4; Rf represents a perfluoroalkylene radical containing from 1 to 8 carbon atoms. The process is characterized in that a fluoroalkoxy perfluoroacyl fluoride of the formula: (II), is slowly heated with a salifying agent and a solvent in the, presence of a catalytic amount of N,N-dimethylformamide with an, end temperature within the range of from 60° to 150°C being reached.
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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
- Granted June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- 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
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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.