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Expired Canadian patentCanada

Aqueous dispersion type coating material

CA 1303768 C · Owner: Ogawa, Hisao · Inventors: Ishidoya, Masahiro; Ogawa, Hisao; Taniguchi, Hitoshi

CIPO record

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Abstract From the Canadian patent

An aqueous dispersion type coating material containing as a film forming constituent an aqueous dispersion that can be obtained by making contacted with an aqueous medium under the presence of base substance a resin reactant with acid value at 10 to 30 which can be obtained by reacting a water soluble epoxy-denatured alkyd resin with an epoxy resin in solid state at ordinary temperature and by adding and polymerizing at least a part of these resins has been disclosed. Because this coating material has been emulsified in a translucent colloidal emulsion region within an aqueous medium, its finished appearance and corrosion resistance are superior and its structural viscosity can be …

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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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
  • 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
GrantedJune 16, 1992
Term endedJune 16, 2009
Patent numberCA 1303768 C
Classification (IPC)C08L63/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJune 13, 1988Patent grantedJune 16, 1992Term endedJune 16, 2009

Sources & verification

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