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Expired Canadian patentCanada

Aqueous dispersion type coating material

CA 1325301 C · Owner: Ishidoya, Masahiro · Inventors: Ishidoya, Masahiro; Ogawa, Hisao; Soma, Toru

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Abstract From the Canadian patent

An aqueous dispersion type coating material capable of forming a coated film having a high level of water resisting property and mechanical strength has been disclosed which contains as a film forming constituent an aqueous dispersion of a resin reactant of a hydrophobic high molecular weight linear polyester resin excellent in water resisting property and mechanical strength and a low polarity water soluble polyester resin. Since in this coating material the hydrophobic high, molecular linear polyester resin is added to a water soluble polyester resin and emulsified into water in the particle size of colloidal emulsion region the coated, film is excellent in adhesive property storage …

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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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 1988
GrantedDecember 14, 1993
Term endedDecember 14, 2010
Patent numberCA 1325301 C
Classification (IPC)C09D167/00 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 13, 1988Patent grantedDec 14, 1993Term endedDec 14, 2010

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