Differential pressure sensor
CA 2320867 A1 · Owner: A. Theobald S.A. · Inventors: Cheveux, Jean-Pierre; Pechoux, Christophe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a sensor operating on to the double differential capacitor whereof the mobile armature consists of the sensor deformable membrane (7) comprising a measuring circuit (13) of the capacitor capacitance levels incorporated in the sensor housing (1) consisting in first (13a) and second (13b) double face interconnected circuits located on each side of the membrane and connected thereto at its peripheral region by connecting means (8) said circuits faces, oriented towards the membrane (7) used for respectively implanting the capacitor armatures (11 12), and said circuit faces, opposite the membrane (7) comprising each a region whereon are respectively implanted components …
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 February 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 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.