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Expired Canadian patentCanada

Mass flow meter working on the coriolis principle

CA 1268354 C · Owner: Simonsen, Jens K. · Inventors: Simonsen, Jens K.

CIPO record

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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 mass flow meter working on the Coriolis principle comprises two straight measuring tubes (1,2) extending parallel to each other in juxtaposition. With the aid of two tube connectors (3 4), they, are connected in parallel fluid mechanically. Compensating tubes (5, 6) extend from respectively one tube connector (3 4) up to a, central zone (7). They have substantially the same coefficient of thermal expansion as the measuring tubes (1 2). The supply and, discharge passages (11 12) lead from the central zone (7) to the associated connection (14, 15). In this way one obtains a late-, rally compact meter which works independently of the temperature.

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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 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 27, 1985
GrantedMay 1, 1990
Term endedMay 1, 2007
Patent numberCA 1268354 C
Classification (IPC)G01F1/84

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedNov 27, 1985Patent grantedMay 1, 1990Term endedMay 1, 2007

Sources & verification

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