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Expired Canadian patentCanada

Composite acrylic resin particles

CA 1306079 C · Owner: Nippon Paint Co. Ltd. · Inventors: Miyazono, Tadafumi; Ishikura, Shinichi

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Composite acrylic resin particles each comprising a particulate metal-containing crosslinked acrylic polymer to which a number of substantially linear acrylic polymer chains are chemically bonded are provided. Such particles are specifically useful as resinous filler in curing type coating compositions because of having curing catalytic activities.

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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 August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.
FiledApril 21, 1988
GrantedAugust 4, 1992
Term endedAugust 4, 2009
Patent numberCA 1306079 C
Classification (IPC)C08F265/04 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedApril 21, 1988Patent grantedAug 4, 1992Term endedAug 4, 2009

Sources & verification

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