Rubber dispersive agent for insoluble sulphur and its process
CA 1267253 C · Owner: Sanshin Kagaku Kogyo Co. Ltd · Inventors: Kifune, Tatsuo; Ito, Takeharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved rubber dispersive agent for sulphur is provided which consists of oil composition consisting of rubber processing oil to which rubber or 0.1 ? 30% by weight, and or insoluble sulphur to which said oil composition is to be added at 0.5 ? 30% by weight of total amount. The agent is prepared by mixing the insoluble sulphur with rubber and rubber processing oil under the presence of or non-presence of organic solvent. The rubber dispersive agent realizes to improve dispersing property of insoluble sulphur into rubber, and to improve the fluidability and stability of the insoluble sulphur itself.
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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 April 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2007.
- 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.