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Expired Canadian patentCanada

Method for preparing monoclonal antibody to hepatitis b surface antigen

CA 1339202 C · Owner: Maeda, Toshihiro · Inventors: Eda, Yasuyuki; Tashiro, Akira; Nishiyama, Kiyoto

CIPO record

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Abstract From the Canadian patent

Disclosed is a monoclonal antibody to hepatitis B surface antigen (HBsAg) which is prepared by forming hybridomas between human peripheral blood lymphocyte cells, derived from humans having high titers of anti-HBsAG and myeloma cells, cloning the hybridomas and selecting the antibody-producing clones. The monoclonal antibody can react with all the subtypes of HBsAg and is expected to be very effective in diagnosis and treatment of diseases due to the viral infection.

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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 5, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 25, 1985
GrantedAugust 5, 1997
Term endedAugust 5, 2014
Patent numberCA 1339202 C
Classification (IPC)C07K16/08 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004200720102013Application filedOct 25, 1985Patent grantedAug 5, 1997Term endedAug 5, 2014

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