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Expired Canadian patentCanada

Thin film peeling apparatus

CA 1311642 C · Owner: Sumi, Shigeo · Inventors: Seki, Mitsuhiro; Sumi, Shigeo

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A thin film peeling apparatus in which a portion of a thin film adhered to a base plate is initially lifted and subsequently peeled therefrom. The film peeling apparatus includes a conveying device for conveying the base plate along a base plate conveyance path, a fir t thin film conveyance device for conveying the lifted portion of the thin film and a second thin film conveyance device for subsequently conveying the thin film. The first thin film conveyance device is disposed so that the thin film is peeled in a direction substantially perpendicular to the direction of conveyance of the base plate. The second thin film conveyance device includes at least one fluid ejector for ejecting …

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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 December 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 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.
FiledApril 25, 1989
GrantedDecember 22, 1992
Term endedDecember 22, 2009
Patent numberCA 1311642 C
Classification (IPC)B29C63/00 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedApril 25, 1989Patent grantedDec 22, 1992Term endedDec 22, 2009

Sources & verification

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