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Expired Canadian patentCanada

Dispersible organoclay for unsaturated polyester resins

CA 1318436 C · Owner: Goodman, Howard · Inventors: Smith, Douglas Neil; Goodman, Howard; Dingle, Kathryn Beverley

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

An organophilic clay gellant which is readily dispersible in unsaturated polyester resin compositions without requiring first being dispersed in styrene to form a pregel, and the process of preparation thereof are, described.

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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 May 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 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 22, 1988
GrantedMay 25, 1993
Term endedMay 25, 2010
Patent numberCA 1318436 C
Classification (IPC)C08K9/04 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 22, 1988Patent grantedMay 25, 1993Term endedMay 25, 2010

Sources & verification

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