A safety and automatic stop device, in particular for gas expansion stations
CA 2078055 C · Owner: Gaz De France · Inventors: Cornil, Jean-Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety and automatic stop device for interrupting the flow of gaseous fluid along a main duct by tripping a safety valve member, the device comprising a safety valve comprising a closing actuator for closing the safety valve member and an opening actuator for opening the safety valve member and an, independent device for remotely controlling said safety valve comprising both a closing control module co-operating with a pressure-measuring housing to deliver an on/off pneumatic signal to the closing actuator as a function of the value of the pressure of a gaseous fluid to be controlled relative to at least one reference pressure determined by the pressuremeasuring housing, and manual …
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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 September 11, 1992 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- 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.