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Expired Canadian patentCanada

Method for producing asialoganglioside related compounds

CA 1251199 A · Owner: Rikagaku Kenkyusho · Inventors: Shinuchi, Tadami; Ogawa, Tomoya; Sugimoto, Mamoru

CIPO record

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Abstract From the Canadian patent

Method for the production of asialoganglioside related compounds of the formula (I). (I), wherein R1 is hydrogen or benzoyl R2 is hydrogen or acetyl, R3 is hydrogen acetyl, .beta.-D-galactopyranosyl or 2,3,4,6-tetra- O-acetyl-.beta.-D-galactopyranosyl, R7 and R8 are individually alkyl having 1 to 30 carbon atoms and Ac is acetyl.

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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 March 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 14, 2006.
  • 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 24, 1986
GrantedMarch 14, 1989
Term endedMarch 14, 2006
Patent numberCA 1251199 A
Classification (IPC)C07H5/06 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedFeb 24, 1986Patent grantedMarch 14, 1989Term endedMarch 14, 2006

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