Alarm for a refrigerator
CA 1268229 C · Owner: Whirlpool Corporation · Inventors: Janke, Donald E.; Linstromberg, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PA-5326-0-RE-USA, Alarm for a Refrigerator Abstract, An alarm is disclosed herein for providing an indication when a certain condition, such as a door ajar condition of a refrigerator, has existed for a predetermined time. The alarm includes a capacitor means cou-, pled to the capacitor for charging same while the certain condition is in existence, an indicating device and a voltage sensitive switch coupled to the capacitor and to the indicating device for repetitively partially discharging the capacitor through the indicating device when the charge on the capacitor reaches a particular level. A series of alarm pulses are thereby developed by the indicating device once the certain condition …
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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 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- 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.