Compounding formulas for rubber-metal adhesion (use of cobalt propionate)
CA 1214582 A · Owner: Firestone Tire & Rubber Company (The) · Inventors: Kang, Jung W.; Koch, Robert C.; Davis, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a rubber skim stock and a product containing the skim stock having improved adhesion between a brassed or zinc coated metal member and contiguous rubber skim stock. The invention lies in the discovery that improved rubber-to-metal adhesion, and adhesion retention, can be obtained by adding to an otherwise conventional rubber skim stock composition appropriate amounts of cobalt propionate. In the practice of this invention cobalt, propionate is mixed into a rubber skim stock composition which composition is brought into contiguous relationship with a brassed or zinc coated metal member in the unvulcanized composition followed by vulcanization to yield the end …
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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 November 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 2003.
- 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.