Expired Canadian patentCanada
Polyolefins stabilized against oxidative degradation with mixtures of aralkyl-substituted diarylamines and sterically hindered phenols
CA 1318059 C · Owner: Chucta, Thomas Max · Inventors: Chucta, Thomas Max
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyolefin is stabilized against oxidative degradation by the presence therein of a stabilizing amount of an antioxidant composition which comprises: a) at least one aralkyl-substituted diarylamine; and, b) at least one sterically hindered phenol.
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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 May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 30, 1987
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1318059 C
Classification (IPC)C08K5/00 +2 more
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.