Liquid detecting piezoelectric device, liquid container and mounting module member
CA 2308918 C · Owner: Kanaya, Munehide · Inventors: Tsukada, Kenji; Kanaya, Munehide; Usui, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid detection device attached on a liquid container for detecting a liquid consumption status of the liquid contained in the liquid container the liquid detection device including a vibrating section symmetrical about a center thereof and at least one electrode electrically connecting with said vibrating section.
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 19, 2000 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2022.
- 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.