Water saving device for toilet cisterns
CA 2204192 C · Owner: Tremblay, Gaston · Inventors: Tremblay, Gaston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to water saving systems for water closets and similar systems equipped with a flapper valve which when opened, remain open until the reservoir is empty. A small bottomless reservoir (20) is placed in the regular reservoir (12) of a water closet so as to create two separate reservoirs one inside the other. At the base (27) of the said smaller reservoir is an opening (26) allowing water to enter from the base of the regular reservoir. At the top of the small reservoir is a flapper (24) which is actuated by the lever arm (18) that actuates the flush cycle of the water closet and which closes as soon as the lever arm is released. With the small reservoir full and its …
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 May 1, 1997 and granted April 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2019.
- 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.