Expired Canadian patentCanada
Steerable drilling system
CA 2545765 C · Owner: Hale, Nigel · Inventors: Hale, Nigel; Downton, Geoff
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A steerable drilling system comprises a bias unit 14 operable by means of a control valve arrangement 22 the control valve arrangement 22 comprising a rotary valve 24 having a control shaft 28 the angular position of which is controlled by a motor 30.
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 May 3, 2006 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2026.
- 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.
FiledMay 3, 2006
GrantedApril 30, 2013
Term endedMay 3, 2026
Patent numberCA 2545765 C
Classification (IPC)E21B7/04
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.