Pressure-measuring arrangement with high linearity
CA 2101068 A1 · Owner: Endress U. Hauser Gmbh U. Co. · Inventors: Benzel, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pressure-Measuring Arrangement with High Linearity, Abstract, A pressure-measuring arrangement has a pressure sensor structure with a pressure-dependent measuring capacitance, a pressure-independent reference capacitance and an evaluating circuit which derives the pressure from a capacitance measurement. To reduce the linearity error, according to the inventive pressure-measuring arrangement a further capacitance is implemented as a pressure-dependent capacitance with a further electrode formed on the diaphragm of the pressure sensor structure, with the measuring electrode and the further electrode having angular extensions changing oppositely to each other as a function of the radius and …
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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 November 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2014.
- 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.