Polyolefin composition
CA 1298021 C · Owner: Fukui, Yoshiharu · Inventors: Koyama, Teruhisa; Kuroda, Kazuhisa; Fukui, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyolefin composition contains (1) from 0.01 to 1.0 part by weight of tris(3,5-di-t-butyl-4hydroxybenzyl)isocyanurate, (2) from 0.01 to 0.5 part by weight of a pentaerythritol diphosphite compound represented by the formula:, where R1 represents a methyl group a tertiary butyl, group or a tertiary amyl group R2 represents a hydrogen, atom, a methyl group a tertiary butyl group, a tertiary, amyl group a phenyl group or a cyclohexyl group, R3 represents a hydrogen atom, a methyl group or a tertiary butyl group and R4 represents a hydrogen atom a methyl, group or a tertiary butyl group provided that not all, of R2, R3 and R4 simultaneously represent hydrogen atoms, (3) from 0.01 to 11.0 …
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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
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.