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Expired Canadian patentCanada

Process for the preparation of difructose dianhydride iii

CA 1329161 C · Owner: Uchiyama, Takao · Inventors: Kawamura, Mishio; Tanaka, Kuniji; Uchiyama, Takao

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Abstract From the Canadian patent

Disclosed herein is a process for preparing difructose dianhydride III (DFA III) comprising reacting inulin with an inulin lytic enzyme derived from a microorganism belonging to Arthrobacter ilicis. The enzyme employed herein efficiently produces DFA III from inulin and is more stable against heat than conventional enzymes. The present process enables industrial continuous production of DFA III. The preferred strain used herein is Arthrobacter ilicis MCI 2297 (FERM P-9893). 16

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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 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 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.
FiledMarch 6, 1989
GrantedMay 3, 1994
Term endedMay 3, 2011
Patent numberCA 1329161 C
Classification (IPC)C12N9/14 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMarch 6, 1989Patent grantedMay 3, 1994Term endedMay 3, 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.