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Expired Canadian patentCanada

.alpha.-AMYLASE INHIBITOR FROM A STREPTOMYCETE AND PROCESS FOR ITS PREPARATION

CA 1105404 A · Owner: Hoechst Aktiengesellschaft · Inventors: Weidenmuller, Hans-Ludwig; Pfaff, Werner; Vertesy, Laszlo

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Abstract From the Canadian patent

Inhibitor for the glycoside hydrolases of the digestive tract, more particularly of the pancreatic .alpha.-amylase produced by fermentation of the specific microorganism Streptomyces tendae, strain 4158, as well as the variants and mutants thereof the microbe strain per se and processes for the isolation of the inhibitor and for its purification.

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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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 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.
FiledJanuary 18, 1978
GrantedJuly 21, 1981
Term endedJuly 21, 1998
Patent numberCA 1105404 A
Classification (IPC)C12P21/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJan 18, 1978Patent grantedJuly 21, 1981Term endedJuly 21, 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.