Phenolic esteramide antioxidants
CA 1188319 A · Owner: Uniroyal, Inc. · Inventors: Barrows, Franklin H.; Jancis, Elmar H.; Gencarelli, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel phenolic esteramide antioxidants protect organic materials such as synthetic and natural rubbers petroleum products, and plastics from oxidative degradation. These compounds have the formula R1COOANHCOR2 wherein A is C2, to C12 alkylene, C2 to C5 alkylene substituted with one or two -CH2O2C(CH2)2R3 groups, wherein R3 is 3-W-5-Y-4-hydroxyphenyl, wherein W and Y may be the same or different and are C1 to C12 alkyl, or A is C4 to C8 cycloalkylene or,-(CH2)bCH-0 wherein b is 0 or 1 and O represents C3 to C6 cycloalkyl; and R1 is (-CH2)2R3 and R2 is C1 to C20 alkyl C6 to C10 aryl, or phenyl substituted with halogen C1 to C12 alkyl, C1 to C12, alkoxy, nitro or hydroxy, or R2 is -BCONHAO2CP1 …
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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 June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
- 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.