Toughened thermoplastic polyester compositions
CA 2089266 C · Owner: Blatz, Philip S. · Inventors: Blatz, Philip S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Toughened semi-crystalline thermoplastic polyester molding composition consisting essentially of a polyester resin and an ionomer of ethylene, a softening comonomer and unsaturated carboxylic acid such as ethylene/n-butyl acrylate/methacrylic acid. The molding compositions of the present invention can be molded into semifinished and finished articles by such processes as compression molding, injection molding extrusion extrusion blow molding, rotational molding melt spinning and stamping.
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 August 9, 1991 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2013.
- 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.