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Expired Canadian patentCanada

Method of antibodies separation from erythrocytes and separation solventsfor its use

CA 1288342 C · Owner: Ogiri, Kenji · Inventors: Yamaguchi, Hideo; Seno, Taiko; Ogiri, Shunichi

CIPO record

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Abstract From the Canadian patent

This invention relates to a method of separating antibodies from erythrocytes comprising the steps of obtaining a sample of blood, mixing this blood with physiological saline and a solvent comprising a mixture of trichlorotrifluoro ethane and methylenechloride, centrifuging said mixture to form layers and removing said antibodies as the top layer from the centrifuge.

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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 September 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 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.
FiledMay 26, 1986
GrantedSeptember 3, 1991
Term endedSeptember 3, 2008
Patent numberCA 1288342 C
Classification (IPC)A61K39/39 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 26, 1986Patent grantedSep 3, 1991Term endedSep 3, 2008

Sources & verification

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