Transmitter with isolation assembly for pressure sensor
CA 2283588 A1 · Owner: Sittler, Fred C. · Inventors: Sittler, Fred C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process control transmitter (10) includes a transmitter housing (12) and transmitter circuitry (20) adapted for providing a transmitter output related to a sensed pressure. A sensor coupling (42) in the housing (12) defines a pressure sensor cavity which is filled with isolation fluid. An isolation diaphragm (46) separates the sensor cavity from a process fluid and is adapted to transmit pressure therebetween. The pressure sensor (16) is mounted in the sensor cavity and provides an output related to pressure to the transmitter circuitry (20). A thermal compensation member (44) is coupled to the sensor cavity and has a thermal expansion coefficient which is different than a …
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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 March 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2020.
- 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.