Crosslinking the surface of rubber molding
CA 1284780 C · Owner: Sumitomo Chemical Company, Limited · Inventors: Shinonaga, Hideo; Kitadono, Kaoru; Okita, Taisuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of crosslinking a rubber or plastic molding is described, which comprises irradiating the molding with electron beams so as to limitedly crosslink only the surface of the molding and heating the resulting molding to perform crosslinking with a crosslinking agent and expansion with a blowing agent contained therein. The molding thus-treated has excellent shape-sustaining properties and good surface appearance. Thus it is expected to find many applications in various fields.
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 June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- 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.