Combination fiber optic/electrical well logging cable
CA 2244833 A1 · Owner: Lopez, Josephine · Inventors: Hunziker, James C.; Lopez, Josephine; Ha, Stephen T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combination fiber optic/electrical well logging cable comprising at least one insulated electrical conductor and a plurality of armor wires surrounding the electrical conductor. The armor wires include at least one tube having an optical fiber disposed inside the tube. In a preferred embodiment the armor wires are disposed in two, concentric layers circumscribing the electrical conductor. One or more of the armor wires in the innermost layer of armor wires includes the tube having the optical fiber disposed therein. The tube has an external diameter which is substantially the same as the armor wires in the layer in which the tube is located. The inner diameter of the tube is selected to …
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 August 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2020.
- 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.