Sand screen
CA 2408266 A1 · Owner: Schlumberger Technology Corporation · Inventors: Bixenman, Patrick W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a sand screen comprising a base pipe with openings cut directly, thereon. The size, shape, and configuration of the openings may be varied depending on, the filtration, inflow, and strength characteristics desired by the operator. The openings, may be cut directly on the base pipe by use of water jet laser, or saw , cutting techniques.
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 October 16, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2024.
- 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.