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Expired Canadian patentCanada

Water-insoluble enzyme compositions

CA 1100066 A · Owner: Kali-Chemie Aktiengesellschaft · Inventors: Bonse, Dirk; Weidenbach, Guenter

CIPO record

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Abstract From the Canadian patent

An improved process for preparing a water-insoluble enzyme composition having a high enzymatic activity and containing the enzyme covalently bonded to an inorganic support material is disclosed, wherein such an inorganic support material being capable of covalently bonding the enzyme, which has a pore-size distribution wherein the most frequent pore-diameter is such that in the resulting enzyme composition for any enzyme concentration contained therein the enzymatic activity per weight unit of the composition is the highest activity per weight unit of the composition which is obtainable at this enzyme concentration, is contacted with an enzyme solution comprising such an amount of enzyme …

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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 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.
FiledJune 8, 1978
GrantedApril 28, 1981
Term endedApril 28, 1998
Patent numberCA 1100066 A
Classification (IPC)C07K17/14 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJune 8, 1978Patent grantedApril 28, 1981Term endedApril 28, 1998

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