Impact modified graft copolymer compositions containing broad molecular weight distribution polypropylene
CA 2094068 C · Owner: Himont Incorporated · Inventors: Conboy, Michael R.; 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 impact modified graft copolymer compositions comprising (A) from 10 to 90% of a graft copolymer of a propylene polymer material having graft polymerized thereto one or more vinyl monomer(s) (B) from 90, to 10% of at least one broad molecular weight distribution propylene polymer material, and (C) from 2 to 40% of at least one rubber component, wherein (A) + (B) + (C) is 100 % and, filled compositions thereof. The compositions are useful as stand-alone structural materials.
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 April 15, 1993 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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.