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Expired Canadian patentCanada

Multi-layer laminated resin film, and method and apparatus for producing the same

CA 1181562 A · Owner: Tokan Kogyo Co. Ltd. · Inventors: Ishihara, Masatomo; Komoda, Hirohisa

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Abstract From the Canadian patent

A multi-layer laminated resin film comprising top and bottom outer laminates of sandwich structure each including a layer of reclaimed synthetic resin mixture entirely surrounded by a second fresh resin layer and an inner layer interposed between and secured to the inside surface of the top and bottom laminates A process for, producing a multi-layer laminated resin film using reclaimed resin mixture in which a first resin of reclaimed synthetic resin mixture is fed into a first composite die in a first direction, a second resin of fresh resin is fed into the first composite die in a second direction at right angles to the first direction to surround the first resin adhesive is, fed into a …

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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 January 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 8, 1981
GrantedJanuary 29, 1985
Term endedJanuary 29, 2002
Patent numberCA 1181562 A
Classification (IPC)B32B27/08 +1 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedMay 8, 1981Patent grantedJan 29, 1985Term endedJan 29, 2002

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.