Promotor for bonding between rubber and steel cord, and rubber composition and rubber product containing the bonding promotor
CA 2033019 A1 · Owner: Ogihara, Yoshihisa · Inventors: Kayama, Kazuyoshi; Kawazura, Tetsuji; Yoneyama, Fumiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A promoter for bonding between a rubber and a steel cord, which is represented by the following general formula (I):, (I), wherein R1, R2 and R3 may be the same or different from one another and each represents a monocarboxylic radical;, a rubber composition containing the bonding promoter and, rubber products made from the rubber composition.
Read the whole patent
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
- Filed December 21, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.