Catalysts for olefin polymer production, methods for producing them, and methods for producing olefin polymers
CA 2306871 A1 · Owner: Sato, Haruhito · Inventors: Kuramoto, Masahiko; Sato, Haruhito
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A highly active catalyst for olefin polymerization; a process for efficiently producing the catalyst; and a process for efficiently producing a high-quality polyolefin reduced in residual metal content using the catalyst and without using a large quantity of an organoaluminum compound. The olefin polymer production process is characterized by using as a catalyst component either a reaction product obtained through contacting from a clay clay mineral, or ion-, exchanging lamellar compound an organosilane compound, and (C) water or a clay treated with a silane compound.
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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 August 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2021.
- 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.