Improved piezoelectric resonator chemical sensing device
CA 2257344 A1 · Owner: Everhart, Dennis S. · Inventors: Everhart, Dennis S.; Josse, Fabien J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention comprises a sensor for measuring an analyte in a medium comprising a piezoelectric resonator having a first side with an electroded region and a second opposing side having an electroded region that is different in size and/or shape of the first electrode. The piezoelectric resonator of the present invention is capable of measuring more than one parameter thereby providing a multi-information sensing device. The present invention also includes an apparatus and method for detecting and measuring an analyte in a medium which utilizes the piezoelectric resonator sensor of the present invention.
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 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 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.