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Expired Canadian patentCanada

Water-dilutable air-drying protective coating compositions

CA 1339431 C · Owner: Dworak, Gert · Inventors: Awad, Rami-Raimund; Dworak, Gert; Weger, Walter

CIPO record

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Abstract From the Canadian patent

The invention relates to water-dilutable airdrying protective coating compositions based on a combination of select water-dilutable alkyd resins with aqueous polymer dispersions and maleinized oils or fatty acids. The products are used with or without pigments extenders and/or, paint adjuvants or additives depending on the particular, end application as air-drying protective coating compositions for wood and metal substrates, particularly for brushing lacquers and wood varnishes.

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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 September 2, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2014.
  • 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 30, 1989
GrantedSeptember 2, 1997
Term endedSeptember 2, 2014
Patent numberCA 1339431 C
Classification (IPC)C09D167/08 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedAug 30, 1989Patent grantedSep 2, 1997Term endedSep 2, 2014

Sources & verification

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