Arylene sulfide polymer preparation
CA 1196147 A · Owner: Phillips Petroleum Company · Inventors: Edmonds, James T. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing arylene sulfide polymer in which a reaction mixture containing at least one polyhalo-substituted aromatic compound, at least one organic amide, at least one alkali metal carboxylate, H2S and water in an amount up to 5 weight percent of the total of the reaction mixture components is contacted at polymerization conditions for a time sufficient to produce polymer. In a preferred embodiment, at least one alkali metal carboxylate is present in the reaction mixture.
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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 October 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2002.
- 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.