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Expired Canadian patentCanada

Solid flowable polymer molding medium

CA 1287435 C · Owner: United Technologies Corporation · Inventors: Kromrey, Robert V.

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

Solid Flowable Polymer Molding Medium The present invention is directed to a solid flowable particulate polymer having a nominal flow rate of at least 0.6 gram per second through a 1.1 centimeter diameter pipe 7.6 centimeter long under applied pressure of 10.34 MPa. The polymer is capable of producing a substantially uniform predetermined pressure on the surface of an article to be molded in an essentially enclosed pressure vessel in response to heat and/or pressure.

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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 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 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.
FiledSeptember 9, 1987
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287435 C
Classification (IPC)C08L83/04 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedSep 9, 1987Patent grantedAug 6, 1991Term endedAug 6, 2008

Sources & verification

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