Domestic appliance having electrically isolated input control circuitry
CA 2032966 C · Owner: Muller, Peter · Inventors: Striek, Ralf-Jurgen; Muller, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a domestic appliance such as a washer dishwasher, dryer, beverage preparation device or the like having several control circuits driven by varying voltage supplies the, input control circuit is supplied with a relatively low voltage and is electrically isolated from higher voltages within the circuitry of the appliance. An optical isolator is provided in the communication channel between the input control circuit and a power control circuit which is connected to circuit elements connected to the A. C. line voltage, The low voltage supply driving the input control circuit is also isolated from the A. C. line voltage. All operator accessible components are coupled to the input control …
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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
- Filed December 21, 1990 and granted September 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.