Thermoplastic blends containing graft copolymers of polyacrylates as impact modifiers
CA 2091533 C · Owner: Montell North America Inc. · Inventors: Giroux, Thomas A.; Denicola, Anthony J. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are blends comprising a propylene polymer material grafted with a polymerizable monomer(s) of a polymer(s) having a Tg greater than 80°C a propylene polymer, material grafted with a polymerizable monomer(s) of a polymer(s) having a Tg less than 20°C, and optionally at least one other rubber modifier.
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 March 11, 1993 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2015.
- 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.