Propane gas leak detection
CA 2103605 C · Owner: Ferrellgas, Inc. · Inventors: Boyer, Terrence M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A propane gas leak detection method includes permanently installing a test adapter unit in a line between a propane gas service valve unit and a first regulator and an adapter fitting in a pressure gauge receptacle of the service valve unit, temporarily connecting a flowmeter to the adapters closing the service, valve unit to bypass gas through the flowmeter observing, the rate of gas flow on the flowmeter and disconnecting, the flowmeter from the adapters after the gas leak test. The invention provides variations in the test adapters for use with service valve units having differing types of fittings and receptacles available.
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 August 9, 1993 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2015.
- 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.