Expired Canadian patentCanada
Rubber composition
CA 1113633 A · Owner: The Goodyear Tire & Rubber Company · Inventors: Harrison, John G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rubber composition comprising a 100 parts of a synthetic or natural rubber and 2 to 15 parts of a viscous polymeric oil composed of the Diels-Alder reaction product of furfural and a conjugated diene containing 4 to 12 carbon atoms.
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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 December 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 26, 1977
GrantedDecember 1, 1981
Term endedDecember 1, 1998
Patent numberCA 1113633 A
Classification (IPC)C08L7/00 +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.