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Expired Canadian patentCanada

Transfer sheet and process for preparation thereof

CA 1107158 A · Owner: Mita Industrial Company Limited · Inventors: Kato, Mamoru; Aizawa, Tatsuo; Kamezawa, Yasutoki

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Abstract From the Canadian patent

A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) a thermoplastic acrylic polymer having a carboxyl group content of 2 to 30 % by weight and (B) a thermosetting resin reactive with the acrylic polymer (A), and a process for preparing this transfer sheet by using an aqueous coating composition are disclosed. In this transfer sheet the electric, resistance can be maintained at a high level even …

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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 16, 1977
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107158 A
Classification (IPC)G03G7/00 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedSep 16, 1977Patent grantedAug 18, 1981Term endedAug 18, 1998

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