Method and apparatus for repairing damaged tubes
CA 2156253 C · Owner: Frederick, Gregory J. · Inventors: Frederick, Gregory J.; Findlan, Shane J.; Childs, Wylie J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laser welding apparatus (320) for clad welding the interior surface of a tube (20) is disclosed. The apparatus includes a rotating sleeve (324) positionable within the tube. Located within the rotating sleeve is a fiber optic cable (340) and a filler passage (386). The fiber optic cable receives laser energy from a laser (344). The filler passage receives filler material from a fillermetal delivery system (330) that synchronously moves with the rotating sleeve. Positioned at the end of the rotating sleeve is a welding head (322) which includes a head aperture (394) and a laser energy directional modification assembly (392). The laser energy from the fiber optic cable is transferred …
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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 February 10, 1994 and granted October 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2016.
- 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.