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Expired Canadian patentCanada

L-LYSINE .alpha.-OXIDASE

CA 1111790 A · Owner: Yamasa Shoyu Kabushiki Kaisha · Inventors: Soda, Kenji; Kusakabe, Hitoshi; Midorikawa, Yuichiro

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An L-lysine .alpha.-oxidase that is, a novel L-amino, acid oxidase having very high substrate-specificity to L-lysine is produced by culturing a specific microorganism belonging to Trichoderma in a medium. L-lysine contained in a sample can be efficiently determined by using the L-lysine .alpha.-oxidase.

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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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 26, 1979
GrantedNovember 3, 1981
Term endedNovember 3, 1998
Patent numberCA 1111790 A
Classification (IPC)C12P13/08 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedFeb 26, 1979Patent grantedNov 3, 1981Term endedNov 3, 1998

Sources & verification

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