Anchor wavey conduit in coiled tubing
CA 2092958 A1 · Owner: Head, Philip Frederick · Inventors: Head, Philip Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A conduit (2) is disclosed for installation internally of a coiled tube (1), said conduit (2) lying on the inside wall (3) of the tubing. A plurality of anchors (20) is located along the length of the conduit the anchors (20) being activatable between an "active" state when the anchors (20) engage the inside wall (3) and a "neutral" state when the anchors (20) are disengaged from the inside wall (3). The invention also extends to an anchor for use in the conduit and a method of installing the conduit (2) in the coiled tube (1).
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 March 30, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2015.
- 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.