Scorch inhibitors for carboxylated rubbers
CA 1259738 A · Owner: The Goodyear Tire & Rubber Company · Inventors: Grimm, Donald C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Scorch (the premature cross-linking of an elastomer) is a problem that is often encountered in carboxylated rubbers. Salts of certain succinic acid derivatives can be used to greatly improve the scorch resistance of carboxylated rubbers. These salts can be distributed throughout a carboxylated rubber using any procedure that will result in a thorough mixing to form a rubber composition with improved scorch resistance.
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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 September 19, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 19, 2006.
- 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.