Ruggedized multi-layer printed circuit board based downhole antenna
CA 2861674 C · Owner: Halliburton Energy Services, Inc. · Inventors: Hensarling, Jesse K.; Bittar, Michael S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna is provided having a plurality of turns of electrical conduction path around a ferrite core wherein the plurality of turns comprise traces on printed circuit boards on two sides of the ferrite core. Further the antenna may include a first circuit board having a plurality of electrical traces spanning the first circuit board substantially parallel to its width a second circuit board having a plurality of electrical traces spanning the second circuit board at an angle relative to its width and an intermediate board having a central opening. The first and second circuit boards are in a stacked configuration having ferrite material therebetween within the central opening. The …
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 September 18, 2003 and granted May 3, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 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.