Processing aid compositions
CA 1253641 A · Owner: Rohm And Haas Company · Inventors: Carter, William E.; Guth, Gerard; Rabinovic, Ismail S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
i-, PATENT APPLICATION, of, ISMAIL SAMY RABINOVIC HUBERT THOMANN, GERARD GUTH and, WILLIAM EARL CARTER for, IMPROVED PROCESSING AID COMPOSITIONS DN 83-36 MSA:plb, ABSTRACT OF DISCLOSURE This invention is directed to improved processing aid compositions for vinylchloride polymers. The improved processing aid compositions are formed from an intimate admixture of a conventional processing aid for vinylchloride polymers and a dispersion aid polymer. The dispersion aid polymer acts to disperse the processing aid polymer in the vinylchloride polymer reducing the tendency of the processing aid to form lumps or gels in the vinylchloride polymer. The weight ratio of the processing aid polymer to the …
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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 2, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 2, 2006.
- 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.