Pressure sensor with a radially tensioned metal diaphragm
CA 2724092 C · Owner: Dwyer Instruments, Inc. · Inventors: Troyer, Terrence J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure sensor having a radially tensioned diaphragm for measuring fluid pressure. , The pressure sensor includes a first generally concave body member and a second generally , concave metal body member and a radially tensioned flexible diaphragm disposed , therebetween that is tensioned by heating the sensor. The first body member material has a , coefficient of thermal expansion which is not greater than the coefficient of thermal expansion , of the diaphragm material by more than approximately 0.0000015 inch/inch/°F. By sufficiently , more closely matching the coefficient of thermal expansion of the body member material with , the coefficient of thermal expansion of the …
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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 20, 2002 and granted April 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2024.
- 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.