Laminated metal sheet
CA 1296607 C · Owner: Middleton, Nicholas John · Inventors: Heyes, Peter John; Middleton, Nicholas John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing by simultaneous lamination a polymer/metal/polymer laminate, which process comprises laminating to one of the major surfaces of a metal sheet a composite polyester film (A) comprising an inner layer (A1) of a substantially non-crystalline linear polyester having a softening point below 150°C and a melting point above 150°C but below 240°C and an outer layer (A2) of a linear polyester having a melting point above 220°C and, simultaneously laminating to the other major surface of the metal sheet a polyolefin-containing film (B) comprising a bonding resin which is an acid modified polyolefin-resin containing carboxyl or anhydride groups the metal sheet, having been …
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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.