Vacuum cleaner
CA 2006844 C · Owner: Sanyo Electric Co. Ltd. · Inventors: Tsuchida, Yasuyuki; Nakanishi, Yuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner having means for killing noxious small organisms trapped in a dust chamber of the cleaner body by circulating heated exhaust of an electric air blower through the dust chamber. The vacuum cleaner comprises a temperature sensing element for sensing a temperature in the dust chamber a timer, for timing a specified interval from a point of time when the electric air blower is started in killing the noxious small organisms with heat, and a microcomputer for stopping supplying electric power to the electric air blower when a temperature sensed by the temperature sensing element reaches a temperature fatal to the noxious small organisms or when the timer ceases timing the …
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 December 28, 1989 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2011.
- 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.