Process for the polymerisation and copolymerisation of vinyl chloride in suspension
CA 1237245 A · Owner: Anic S.P.A. · Inventors: Caporossi, Adolfo; Del Signore, Leonello
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for the polymerisation and copolymerisation of vinyl chloride in suspension characterised by, using, together with the normal polymerisation agents a, single suspending agent consisting of partially saponified polyvinyl acetate of medium degree of hydrolysis prepared, by the controlled alkaline alcoholysis of polyvinyl acetate in the presence of methyl acetate.
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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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.