Pre-expanded plastic beads for controlling thermal shrinkage and pyrolytic rate of plastic foam
CA 1309902 C · Owner: Arco Chemical Technology, Inc. · Inventors: Yamaguchi, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermal shrinkage and decomposition rate of molded expandable resins of appropriate density are successfully controlled by adding proper amount of water-soluble silicate and or polysilicate during pre-expansion operation of the expandable resins.
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 November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.