Electronic controller for a water purifying unit
CA 1316578 C · Owner: Brown, Barry M. · Inventors: West, Henry L.; Brown, Barry M.; Fearnside, William T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electronic controller is disclosed for a water purifying unit for providing monitoring and test functions to indicate, for example when the, filter should be replaced. The electronic controller apparatus comprises an analog ASIC circuit having a power control section, a conductivity filter testing section, a light emitting diode (LED) driving section, and a bias section. The LED driving section is responsive to the conductivity filter testing section for indicating when the filter should be replaced. The power control section, conductivity filter testing section LED driving section and bias section are all operated in a controlled timed relation by a digital ASIC logic system to minimize …
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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 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.