Apparatus and method for use in testing gas pressure reduction equipment
CA 2201372 C · Owner: Carscadden, Ian Andrew · Inventors: Murphy, David Thomas; Carscadden, Ian Andrew; Reid, Donald James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A portable diagnostic system for testing gas pressure reduction equipment includes a computer arrangement (16) interface to an electro-pneumatic test unit (12) which provides test pressures for and receives information on displacement from the pressure reduction equipment. Unit (12) includes a number of valves including three solenoid on/off valves a needle valve and an , on/off ball valve. The position of the valve member of the needle valve is sensed by a position transducer. Displacement transducers (40 and 42) connected to the reduction equipment sense slamshut valve and regulator , displacements pressure transducer (44) and a differential pressure transducer (102) are each …
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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 July 31, 1996 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 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
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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.