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Expired Canadian patentCanada

Apparatus for monitoring flow of a fluid along a conduit

CA 1308272 C · Owner: Storrar, Andrew M. · Inventors: Storrar, Andrew M.

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

Apparatus 1 for monitoring flow of fluid such as domestic water, along a conduit 2 (shown in dashed lines) comprising a piston and cylinder arrangement 3 having a plurality of free pistons in the, embodiment shown two pistons 4 and 5 and port means 6 which are, so arranged with respect to the pistons 4 and 5 that an inlet port is always open during strokes of each piston 4 or 5 so that fluid flow is continuous along the conduit 2.

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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 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 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.
FiledAugust 25, 1987
GrantedOctober 6, 1992
Term endedOctober 6, 2009
Patent numberCA 1308272 C
Classification (IPC)G01F3/18 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 25, 1987Patent grantedOct 6, 1992Term endedOct 6, 2009

Sources & verification

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