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Expired Canadian patentCanada

Glucose-isomerizing enzyme

CA 1107209 A · Owner: Reynolds (R.J.) Tobacco Company · Inventors: Lee, Chin K.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A process for preparing a glucose-isomerizing enzyme which comprises cultivating a microorganism belonging to the species Flavobacterium arborescens in a nutrient medium under conditions suitable for production of said enzyme by said microorganism and recovering said enzyme. Glucose is converted to fructose in the presence of an enzyme produced by Flavobacterium arborescens.

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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 13, 1977
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107209 A
Classification (IPC)C11D3/38 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedOct 13, 1977Patent grantedAug 18, 1981Term endedAug 18, 1998

Sources & verification

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