Pressure measuring arrangement
CA 2191175 C · Owner: Envec Mess- Und Regeltechnik Gmbh + Co. · Inventors: Klausmann, Lukas; Hegner, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This pressure measuring arrangement (10) which is both, proof against the coupling-in of interference signals and satisfies the specifications relating to explosion protection, comprises a capacitive, ceramic pressure sensor (11) which has a substrate (12) having at least one electrode applied thereto and an associated diaphragm (13) having a counter-electrode applied thereto. Electrical contact can be made with the electrode and counterelectrode at the rear side (121) of the substrate on which, rear side is arranged a converter circuit (14) for capacitance changes which are caused by pressure changes. A current output circuit (17) is arranged inside the metallic housing (15) having a wall …
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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, 1996 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2018.
- 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.