Cavern well pressure trap
CA 2120675 C · Owner: Hladun, Gregory D. · Inventors: Bourque, Jacques G.; Hladun, Gregory D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure trap for a producer well of a subterranean pressurized fluid storage system, the well being lined with a casing having a casing interior connected with a subterranean pressurized fluid storage cavity through a lateral bore includes a divider, for dividing off a chamber from a lower portion of the casing interior which chamber communicates with and extends to a selected level below an entry of the lateral bore into the well casing, and a passage for fluid communication between the chamber and a remainder of the casing interior and below the entry of the lateral bore. The divider is preferably a combination of a cylindrical liner having upper and lower ends respectively positioned …
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 April 6, 1994 and granted January 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2016.
- 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.