Toilet ventilating system
CA 2293817 C · Owner: Nakata, Hitoshi · Inventors: Nakata, Hitoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toilet venting system adaptable to a conventional water closet comprises a vent-pipe connecting a toilet bowl with a water flushing tank. The latter is provided with a sealing. When after the use of the water closet water is let to rapidly escape and flow from the water flushing tank into the toilet bowl, a partial vaccum or negative pressure is created in the water flushing tank. As a result, an upward current occurs foul smelling air and, gases being drawn from the toilet bowl into the water flushing tank. By contacting the wet surface of the interior walls of the latter and , especially, the, surface of the water therein a substantial condensation of the foul smelling gases, takes …
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 31, 1999 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 31, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 31, 2021.
- 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.