High impact polypropylene resin
CA 1183633 A · Owner: Exxon Research And Engineering Company · Inventors: Duvdevani, Ilan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An injection molding or extrusion polypropylene composition having improved impact strength and improved weld line properties, wherein the polypropylene composition comprises a blend composition of an isotactic polypropylene homopolymer having a number average molecular weight as measured by GPC of at least 15,000, about 5 to about 15 parts by weight of a zinc neutralized sulfonated EPDM terpolymer per 100 parts by weight of the isotactic polypropylene homopolymer and about 5 to about 15, parts by weight of a high molecular weight polypropylene.
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
- Granted March 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2002.
- 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.