Emulsifier free aqueous emulsion polymerization process for making fluoropolymers
CA 2446016 A1 · Owner: Kaspar, Harald · Inventors: Kaspar, Harald; Dewitte, Greta; Schwertfeger, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Emulsifier free fluoropolymer manufacturing method in which (a) a chain transfer agent, or a mixture of chain transfer agents are used wherein the chain transfer agents do not yield more than 0.4 weight % relative to the monomer feed of water soluble fluorinated compounds or (b) a chain transfer , agent or a mixture of chain transfer agents selected from alkanes dialkyl , ethers, hydrofluoroethers and/or hydrofluorocarbons.
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 April 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 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.