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Expired Canadian patentCanada

Self-supporting structures containing immobilized carbon particles and method for forming same

CA 1237116 A · Owner: Pall Corporation · Inventors: Gsell, Thomas C.; Degen, Peter J.

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Abstract From the Canadian patent

A process for immobilizing adsorbent carbon particles and forming a self-supporting structure of high compressive strength therefrom is described in which the self-supporting structure substantially eliminates the formation of carbon fines while retaining the adsorption characteristics of the carbon particles. The process for immobilizing the adsorbent carbon particles in the self-supporting structure comprises the steps of:, (a) mixing carbon particles a major portion of, which has particle sizes in the range of from about 200 to about 2,000 microns, with a powdered polymeric binding material, preferably a thermoplastic material having a solid-liquid transition stage in an amount, of about …

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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 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
  • 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 23, 1985
GrantedMay 24, 1988
Term endedMay 24, 2005
Patent numberCA 1237116 A
Classification (IPC)B01J20/20 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedApril 23, 1985Patent grantedMay 24, 1988Term endedMay 24, 2005

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