Method and apparatus for measuring selected characteristics of fluids
CA 1181486 A · Owner: Consolidated Design, Inc. · Inventors: Cole, Everett; Heiser, Lawrence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a method and apparatus for quickly and accurately measuring selected characteristics of a fluid. Particular applications to the printed circuit industry is described in which the concentration of a chemical in a solution is monitored and maintained at a preselected level. Portions of the solution are continually pumped through a microwave sensor that senses the attenuation of the microwave radiation as the solution passes through a sensor. The attenuated signal detected beyond the solution is compared to the signal as detected in the sensor in advance of the solution. If the signals differ by an amount different from the initial amount the concentration of the chemical …
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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 January 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2002.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.