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Expired Canadian patentCanada

Temperature measuring apparatus

CA 1282254 C · Owner: Mayes, M. Dale · Inventors: Mayes, M. Dale

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

This invention relates to an apparatus and process for measuring the temperature of a fluid environment within a vessel. The apparatus features a chamber which opens into the vessel and thus contains a portion of the fluid environment. Structure is provided for preventing substantial convective movement between the portion of the fluid environment within the chamber and the remainder of the fluid environment. A temperature sensing device is also provided which is movable from a position within the chamber to a position into the remainder of the fluid environment for obtaining a temperature measurement. The chamber is maintained at a temperature cooler than that of the fluid environment. …

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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 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2008.
  • 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 3, 1986
GrantedApril 2, 1991
Term endedApril 2, 2008
Patent numberCA 1282254 C
Classification (IPC)G01K1/14 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedOct 3, 1986Patent grantedApril 2, 1991Term endedApril 2, 2008

Sources & verification

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