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Expired Canadian patentCanada

Protein h being capable of binding to igg, gene coding for the said protein h and a process for producing the said protein h

CA 1338707 C · Owner: Bjorck, Lars · Inventors: Gomi, Hideyuki; Bjorck, Lars; Hozumi, Tatsunobu

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Abstract From the Canadian patent

A gene coding for the novel Protein H, which is capable of binding specifically to human IgG of all subclasses, was isolated from Streptococcus sp. AP1 and expressed in host cells, E. coli to produce the Protein H. The new protein is useful in the assay and purification of human IgG, removal or adsorption of excessive IgG from blood and for diagnosis of autoimmune diseases.

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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 November 12, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 10, 1989
GrantedNovember 12, 1996
Term endedNovember 12, 2013
Patent numberCA 1338707 C
Classification (IPC)C12N15/31 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJuly 10, 1989Patent grantedNov 12, 1996Term endedNov 12, 2013

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