Method and apparatus for mapping the trajectory in the subsurface of a borehole
CA 2484104 C · Owner: Seigel, Harold O. · Inventors: Seigel, Harold O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for mapping the trajectory in the subsurface of a borehole including a tiltmeter for measuring the inclination of the borehole relative to the vertical a vector magnetic sensor for measuring the amplitude of the component of the Earth's magnetic field along the axis of the borehole and means for computing the trajectory of the borehole from a multiplicity of these measurements made at selected points along the length of the borehole.
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 7, 2004 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2026.
- 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.