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Expired Canadian patentCanada

Method for preparing dispersions containing antibiotic powder

CA 1329668 C · Owner: Nakayama, Ichiro · Inventors: Kurihara, Yasuo; Uchida, Masashi; Nakayama, Ichiro

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Abstract From the Canadian patent

A method for preparing a dispersion containing antibiotic powder comprises mixing the antibiotic powder and a dispersing medium at a temperature at which the dispersing medium is in the form of a liquid under a reduced pressure of not more than 470 Torr. According to this method the, antibiotic powder is uniformly dispersed in various dispersing mediums and antibiotic products having high antibiotic action is effectively provided by using the resulting dispersion.

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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 May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 22, 1988
GrantedMay 17, 1994
Term endedMay 17, 2011
Patent numberCA 1329668 C
Classification (IPC)C08K3/34 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 22, 1988Patent grantedMay 17, 1994Term endedMay 17, 2011

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