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Expired Canadian patentCanada

Mouldable glistening polymers containing graphite

CA 1237227 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Babler, Fridolin; Weissmuller,

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

Compositions containing high-molecular organic, material for processing to moulded products 0.001 to, 3.0 % by weight of graphite, relative to the highmolecular, organic material, and one or more pigments or polymer-soluble dyes, are suitable for producing moulded products.

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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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 18, 1983
GrantedMay 24, 1988
Term endedMay 24, 2005
Patent numberCA 1237227 A
Classification (IPC)C08K3/04 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedAug 18, 1983Patent grantedMay 24, 1988Term endedMay 24, 2005

Sources & verification

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