Control device for washing machine
CA 2030918 C · Owner: Ohtani, Akihito · Inventors: Ohtani, Akihito; Tamae, Sadayuki; Kiuchi, Mitsuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The control device for a washing machine is provided to have a function of testing the working characteristic of the transmission sensing device for sensing light transmission of water filled while the water supplied in a washing bath is fresh before putting detergent therein or stirring the cloth for rinsing. The control device makes it possible to automatically test the working characteristic of the transmission sensing device and judge if abnormality takes place if the washing or rinsing operation is executed while the washing machine is in operation.
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
- Filed November 27, 1990 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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.