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Expired Canadian patentCanada

Modular rotating biological contactor system

CA 1329280 C · Owner: Miller, Gary · Inventors: Miller, Gary

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

A modular rotating biological contactor apparatus is provided which utilizes a plurality of hemicylindrical trough sections, a plurality of bulkhead means interconnecting adjacent trough sections and a pair of, endplate means. These components are prefabricated and adapted for simple and easy interconnection therebetween thereby to provide from a relative small number of subassemblies a plurality of different configurational possibilities for rotating biological contactor apparatus.

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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.
FiledApril 28, 1988
GrantedMay 3, 1994
Term endedMay 3, 2011
Patent numberCA 1329280 C
Classification (IPC)C02F3/08

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedApril 28, 1988Patent grantedMay 3, 1994Term endedMay 3, 2011

Sources & verification

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