Multilayered articles formed by coextrusion of polycarbonate and polyester
CA 1315934 C · Owner: Mihalich, James M. · Inventors: Mihalich, James M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a multilayer article formed by the coextrusion of a polyester and polycarbonate. The polyester and polycarbonate are extruded into a film wherein the polyester forms the top and bottom layers of the film and the polycarbonate becomes the inner layer. The films may be thermoformed into articles which exhibit excellent strength and impact values.
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 April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
- 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.