Metathesis polymerized olefin articles made from impure monomers and method for producing same
CA 2246789 A1 · Owner: A.O. Smith Corporation · Inventors: Warner, Mark W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metathesis polymerized polyolefin article made from impure monomers is provided. The article is prepared by polymerizing a cyclic olefin monomer in the presence of a metathesis polymerization catalyst and a compatible adsorbent agent such as aluminum oxide resulting in an article having the compatible adsorbent agent dispersed throughout.
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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 September 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2020.
- 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
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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.