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Expired Canadian patentCanada

Production process of phenylglycosides

CA 1286664 C · Owner: Murakami, Koji · Inventors: Nakatsubo, Fumiaki; Matukura, Motoo; Katsura, Yoshiaki

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Abstract From the Canadian patent

A Production Process of Phenylglycosides Abstract of the Disclosure, This invention concerns a process for producing phenolic substances with beneficial biological activities in a high yield, which comprises: subjecting glycose of which OH group at the 1 position is substituted for halogen atom and of which other groups are substituted for acyl groups and a phenol of, which at least one of the ortho-positions in regard to phenolic OH groups is substituted to reaction with alkali metal hydride in dimethylsulfoxide or dimethylformamide in the presence or non-presence of a quat-ammonium salt and then hydrolyzing said acyl groups with an alkaline substance.

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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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 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.
FiledMarch 3, 1988
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286664 C
Classification (IPC)C07H15/20

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMarch 3, 1988Patent grantedJuly 23, 1991Term endedJuly 23, 2008

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