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Expired Canadian patentCanada

Method of controlling the composition of a stable microbial mixed biocenosis

CA 1298801 C · Owner: Becker, Klaus · Inventors: Becker, Klaus

CIPO record

Overview

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

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Abstract From the Canadian patent

The composition of stable microbial mixed biocenoses can be controlled by the addition of supplines and/or inhibitory substances, optionally together with certain nutrients. It is possible in this manner to suppress, e.g. the undesirable formation of bulking sludge in sewage treatment plants or to improve the digestion of food or fodder containing biopolymers in the intestine or rumen.

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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 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
  • 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 12, 1987
GrantedApril 14, 1992
Term endedApril 14, 2009
Patent numberCA 1298801 C
Classification (IPC)C02F3/34 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 12, 1987Patent grantedApril 14, 1992Term endedApril 14, 2009

Sources & verification

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