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Expired Canadian patentCanada

Removal method of granulocytes from blood and granulocyte removing apparatus therefor

CA 1322718 C · Owner: Jimro Co. Ltd · Inventors: Adachi, Masakazu; Nakatani, Masahiro; Honda, Seiichirou

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Abstract From the Canadian patent

Granulocytes can be removed from blood by bringing the blood into contact with a carrier having higher affinity to granulocytes than to lymphocytes. The carrier is preferably a substance having a contact angle in a range of 55°-95° to water e.g. polystyrene, cellulose acetate, nylon polytrifluoro-, ethylene or polyethylene terephthalate. A granulocyte removing apparatus is also disclosed. It comprises a granulocyte-adsorbing portion enclosing therein a carrier having higher affinity to granulocytes than to lymphocytes, a blood inflow port for causing blood to flow into the adsorbing portion, and a blood outflow port for allowing the blood, which has flowed in the adsorbing portion, to flow …

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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 October 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 5, 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.
FiledDecember 9, 1988
GrantedOctober 5, 1993
Term endedOctober 5, 2010
Patent numberCA 1322718 C
Classification (IPC)A61M1/36 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 9, 1988Patent grantedOct 5, 1993Term endedOct 5, 2010

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