Expired Canadian patentCanada
3,5-ditertiary alkyl-4-hydroxyphenyl (alkyl) 6- acyloxy-4-thia hexanoates and hexenamides as antioxidants
CA 1095070 A · Owner: The Goodyear Tire & Rubber Company · Inventors: Kline, Richard H.
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phenolic age resistors such as 4-(3,5-ditertiary butyl-4-hydroxyphenyl)-2-butyl 2-methyl-4-thia-6-octanoyloxyhexanoate are used as antioxidants in diene rubbers such as, butadiene-styrene types and in polyolefins such as polypropy-, lene.
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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 February 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 3, 1998.
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FiledSeptember 29, 1977
GrantedFebruary 3, 1981
Term endedFebruary 3, 1998
Patent numberCA 1095070 A
Classification (IPC)C08K5/37 +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.