Elastomers
CA 1052944 A · Owner: Sumitomo Chemical Company · Inventors: Miki, Tamotsu; Kanagawa, Shuichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new modified elastomer having a phenolic hydroxyl group on the side chain, which is excellent in physical properties, crosslinkability, thermal stability tackiness, adhesiveness and compatibility is obtained, by copolymerizing at least one monomer selected from the group consisting of conjugated dienes and mono-, ethylenically unsaturated monomers or graft-copolymeriz-, ing an elastomer prepared by polymerizing at least one monomer defined above, with a phenolic monomer represented by the general formula, e n R1, R2, R3 R4 and R5 are individually an alkyl, group or a hydrogen atom.
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
- Granted April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 1996.
- 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.