Thermoplastic compositions and process for preparing the same
CA 2118576 C · Owner: Exxon Chemical Patents, Inc. · Inventors: Wang, Hsien-Chang; Powers, Kenneth W.; Yu, Thomas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-vulcanized thermoplastic composition comprising a polyamide and an elastomeric halogen-containing copolymer of a C4 to C7 isomonoolefin and a para-alkylstyrene is prepared by blending the polyamide and elastomeric copolymer in the presence of specified metal compounds in an amount insufficient for vulcanizing the composition. Optionally the re-, sulting composition may be subjected to vulcanization.
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 September 17, 1992 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2014.
- 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.