Patent Yard Sign in
Expired Canadian patentCanada

Pure water conductivity sensor

CA 1253205 A · Owner: Tbi · Inventors: Barben, Theodore R. Ii

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

Abstract of the Disclosure A system for measuring conductivity of a high purity water sample. A multiple electrode probe is immersed in the sample and generates a total conductivity signal proportional to the total conductivity of the sample. A temperature sensing means generates a temperature output indicative of the temperature of the sample. First compensation means responsive to the temperature output from the temperature sensing means generates a pure water correction signal corresponding to the conductivity of absolutely pure water at the temperature of the sample. A first summation means subtracts the pure water correction signal generated by the first compensation means from the …

Read the whole patent

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 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 25, 2006.
  • 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 28, 1986
GrantedApril 25, 1989
Term endedApril 25, 2006
Patent numberCA 1253205 A
Classification (IPC)G01N27/06 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedNov 28, 1986Patent grantedApril 25, 1989Term endedApril 25, 2006

Sources & verification

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