Device for measuring ion concentrations in a measuring liquid
CA 2354424 A1 · Owner: Pechstein, Torsten · Inventors: Pechstein, Torsten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a device for (1) for measuring the concentration of ions, notably of hydrogen (H+) ions in, a measuring liquid using at least one ion-sensitive field effect transistor (pH-ISFET)(2) which is integrated into an electric circuit within the device (1) in such a way that said circuit emits an output signal (U pH) which serves as measure of the ion concentration in the measuring liquid. To provide a circuit which is as simple as possible and in particular comprises as few components as possible, the invention provides for the at least one pH-ISFET (2) to be bridge-connected with at least three resistors (R1, R2, R3).
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 11, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 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.