Wellbore screen
CA 2548477 C · Owner: Absolute Energy Ltd. · Inventors: Russell, Thane Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wellbore screen includes a base pipe including a wall an inner bore surface , and an , outer surface at least one opening formed through the base pipe wall and a filter , cartridge mounted in the at least one opening. In one aspect the wellbore , screen , includes an impermeable layer relative to the at least one opening and the impermeable layer may be selected to be substantially impermeable when in a closed , position in the at least one opening to passage of fluids through the at least one , opening and, the impermeable layer is at least one of (i) selectively openable to permit , fluid flow through the at least one opening and (ii) selectively closeable when , triggered to …
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 December 2, 2004 and granted February 11, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.