Metal coiled tubing with signal transmitting passageway
CA 2213541 C · Owner: Folsom, David N. · Inventors: Mcgavern, Cecil G. Iii; Sides, Winfield M. Iii; Folsom, David N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combination of a metal coiled tubing (12) and a signal transmitting passageway (14) for transmitting and/or receiving signals to well tools (16) positioned in the coiled tubing (12). The signal transmitting passageway (14) is positioned in the wall (15) of the coiled tubing (12) and may transmit and receive hydraulic, electrical or light signals and the signals may be used for transmitting power signals for actuating well tools control signals for , controlling well tools and/or data signals for transmitting or receiving information.
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 3, 1995 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2017.
- 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.