Stabilized polyolefin composition
CA 2074870 A1 · Owner: Ida, Kanako · Inventors: Yachigo, Shinichi; Ida, Kanako; Ishii, Tamaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyolefin composition comprising a polyolefin and the following components:, (A) a phenolic compound represented by the formula (I): (I), wherein R1 is hydrogen or an alkyl of 1 to 3 carbon atoms; (B) an acrylate compound represented by the formula (II):, (II), wherein R2 is an alkyl of 1 to 5 carbon atoms R3 is an, alkyl of 1 to 8 carbon atoms R4 is hydrogen or an alkyl of, 1 to 8 carbon atoms and R5 is hydrogen or methyl; and, (C) at least one organic phosphorous compound such as bis(2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite. This composition is stable against thermal processing thermal oxidation and discoloration, and it is especially useful for fibers and films. …
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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 July 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2014.
- 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.