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Expired Canadian patentCanada

Polyglycidyl ethers, their preparation and their use as thermosetting coating compositions

CA 1340085 C · Owner: Stachowiak, Stephen A. · Inventors: Stachowiak, Stephen A.; Kooymans, Petrus Gerardus; Raudenbusch, Werner T.

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Abstract From the Canadian patent

This invention provides polyglycidyl ethers having on average n epoxy groups per molecule, where 1 < n < 2 which comprise the, reaction products of multifunctional polyglycidyl ethers having on average x epoxy groups per molecule, where x > 2 with (x-n) mol of, monofunctional phenols per mol of the multifunctional polyglycidyl ether; a process for their preparation and their use as thermo-setting coating compositions, particularly for use in electro-deposition coating of articles.

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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 October 13, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 2015.
  • 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 16, 1984
GrantedOctober 13, 1998
Term endedOctober 13, 2015
Patent numberCA 1340085 C
Classification (IPC)C07D303/20 +2 more

Timeline

Timeline From CIPO dates

19851989199319972001200520092013Application filedMay 16, 1984Patent grantedOct 13, 1998Term endedOct 13, 2015

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