Extrusion foamed article and process for producing the same
CA 1073620 A · Owner: Asahi-Dow Limited · Inventors: Seo, Yuji; Watanabe, Seizaburo; Okuda, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure, An extrusion foamed article with thick and large cross-sectional area is made by extrusion foaming a mixture of an ionomer resin and a styrenic resin by use of a volatile blowing agent. The process is specific in easy and economical production of a thick foamed article and a novel foamed article having well balanced properties can be produced by this process. - 1 -
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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 March 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 1997.
- 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.