Inductive sensor head
CA 2321949 C · Owner: Jones, Philip · Inventors: Golder, Roger; Jones, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inductive sensor head for detecting ferrous or non-ferrous electrically conducting objects, in particular rebars in a surrounding medium like concrete or a , brick wall, comprising at least one field coil with a small axial length compared to its , diameter and at least one twin pair of sense coils with a small diameter compared , to the diameter of the field coil. The number of turns of wire on the field coil is small , relative to the number of turns of wire on the sense coils. The common axis of the , sense coils is arranged perpendicular to the axis of the field coil so that there will be , no component or a minimum component of maximum flux that is coaxial with the sense …
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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 2, 2000 and granted February 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2022.
- 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.