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Expired Canadian patentCanada

Flow indicator or flowmeter

CA 1332519 C · Owner: Kobold, Klaus · Inventors: Kobold, Klaus

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The invention relates to a flow indicator or flowmeter with an impeller that can rotate in an essentially circularcylindrical flow chamber of a flow housing that has an inlet channel and an outlet channel, wherein the impeller has an odd number of blades. The impeller is visible through a transparent side wall. The impeller can have magnets ferrite cores or, similar impulse-giving elements by means of which an electronic circuit is actuated so that the device serves not only as a flow indicator but also as a flowmeter.

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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 October 18, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 18, 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.
FiledOctober 6, 1988
GrantedOctober 18, 1994
Term endedOctober 18, 2011
Patent numberCA 1332519 C
Classification (IPC)G01F1/06 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedOct 6, 1988Patent grantedOct 18, 1994Term endedOct 18, 2011

Sources & verification

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