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Expired Canadian patentCanada

Multiphase epoxy thermosets having rubber within disperse phase

CA 1278631 C · Owner: Bard, John Kenneth · Inventors: Bard, John Kenneth

CIPO record

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

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Abstract From the Canadian patent

Disclosed are multiphase epoxy thermosets having improved toughness and peel strength levels. The epoxy thermoset resin can serve as a matrix resin for composite structures and as a high temperature adhesive in bonding bodies together. The matrix comprises a crosslinked continuous phase and a crosslinked discontinuous phase which contains the rubber phase.

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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 January 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2008.
  • 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 25, 1987
GrantedJanuary 2, 1991
Term endedJanuary 2, 2008
Patent numberCA 1278631 C
Classification (IPC)C08G59/40 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJune 25, 1987Patent grantedJan 2, 1991Term endedJan 2, 2008

Sources & verification

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