Dual metallocene catalyst for producing film resins with good machine direction (md) elmendorf tear strength
CA 2736014 C · Owner: Chevron Phillips Chemical Company Lp · Inventors: Cymbaluk, Ted H.; Mcdaniel, Max P.; Jensen, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to catalyst compositions comprising a first metallocene compound a second metallocene compound, at least one chemically-treated solid oxide and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI increased melt strength, and good MD tear properties.
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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 January 20, 2005 and granted November 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.