Polyolefin resin composition
CA 2020373 C · Owner: Mitsui Chemicals, Inc. · Inventors: Kasai, Tetsuji; Shigemoto, Hiromi; Kawamoto, Keiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a stabilized polyolefin resin composition composed essentially of (A) a polyolefin resin (B), an alkyl disulfide compound represented by formula: R1-S-S-R2 I, (wherein R1 and R2 are each an alkyl group with 10 or more carbon atoms) and (C) a triazine compound represented by formula:, (see formula II), (wherein X1 X2 and X3 are each a hydroxy-substituted aralkyl group) or benzene compound represented by formula: (see formula III), (wherein R7, R8 and R9 are each hydrogen or an alkyl group and X4, X5 and X6 are each an hydroxy-substituted aralkyl group) which can keep resistance to heat ageing for a long period of time and does not discolor.
Read the whole patent
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 4, 1990 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 2012.
- 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.