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Expired Canadian patentCanada

Process for forming flakes

CA 1297251 C · Owner: Sagel, John Albert · Inventors: Ostendorf, Daniel Irwin; Sagel, John Albert; Revis, Jack Warren

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

Abstract of the Disclosure Flakes of a hydrophilic solid organic material e.g. polyethylene glycol are formed from a melt of said solid organic material on a belt cooler. The process is improved by wetting the belt cooler with water and/or an organic low molecular, weight, hydrophilic liquid to maintain contact between flake and belt during rapid cooling.

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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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 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.
FiledMay 3, 1988
GrantedMarch 17, 1992
Term endedMarch 17, 2009
Patent numberCA 1297251 C
Classification (IPC)B29B9/04 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 3, 1988Patent grantedMarch 17, 1992Term endedMarch 17, 2009

Sources & verification

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