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Expired Canadian patentCanada

Method of producing phospholipid derivatives

CA 1283075 C · Owner: Kuroda, Akio · Inventors: Kuroda, Akio; Kudo, Satoshi; Sawada, Haruji

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Abstract From the Canadian patent

A method of producing a new phospholipid derivative having two phosphatidyl residues from a starting material phospholipid derivative by transphosphatidylation. In this method, a phospholipid derivative (I) represented by the formula, ... (I), is reacted with a chain polyhydric alcohol represented by the formula, ... (II), in the presence of a phospholipase D having a transphosphatidylation activity (EC 3.1.4.4) thereby, extracting a phospholipid derivative represented by the following formula from the reaction mixture ... (III), In the formulas, R1 and R2 represent acyl groups or alkyl groups, R3 represents an alkylene group (proviso hydrogen, atom may be substituted with a hydroxyl group …

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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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 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.
FiledApril 13, 1988
GrantedApril 16, 1991
Term endedApril 16, 2008
Patent numberCA 1283075 C
Classification (IPC)C12P9/00 +1 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedApril 13, 1988Patent grantedApril 16, 1991Term endedApril 16, 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.