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Expired Canadian patentCanada

Water-dispersible polymers containing metal chelating groups

CA 1254328 A · Owner: Ppg Industries, Inc. · Inventors: Koren, Jeffrey G.; Boberski, William G.; Nugent, Richard M.

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Abstract From the Canadian patent

There is herein provided an aqueous dispersion of a resinous composition which is water-solubilized with a metal compound such as a metal salt, an example of which is zinc acetate. The dispersions can be used in coating applications to provide films having desirable properties as for example in electrodeposition. PAT 9377-1

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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 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 9, 1984
GrantedMay 16, 1989
Term endedMay 16, 2006
Patent numberCA 1254328 A
Classification (IPC)C08L63/02 +2 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedOct 9, 1984Patent grantedMay 16, 1989Term endedMay 16, 2006

Sources & verification

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