Method of making plastic foam laminates and product formed thereby
CA 1078096 A · Owner: Stauffer Chemical Company · Inventors: Goswami, Jagadish C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Plastic foam laminates are formed by heating a laminate of a base and a plastic film, said film comprising a vinyl chloride-vinyl acetate-bis(hydrocarbyl) vinylphosphonate suspension copolymer and a blowing agent, at a temperature of about 140°C. to about 160°C. The foam which is formed thereby has a fine uniform cell quality.
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 May 20, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 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.