Down hole induction and resistive heating tool and method of operating same
CA 2504877 C · Owner: Canitron Systems, Inc. · Inventors: Larovere, Thomas A.; Spencer, Homer L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An induction tool for heating well casing and a method for using and manufacturing the tool. The tool comprises a magnetically permeability core (153) and an electrically conductive coil (176) surrounding the entire circumference of the core. The tool generates magnetic flux which flux is used to heat well casing (120) adjacent to or acted upon by the tool. The heated well casing may be used to melt material used for well sealing.
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 November 6, 2003 and granted July 22, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2025.
- 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.