Process for welding pipe ends and an insulating ring therefor
CA 1250027 A · Owner: Savard, Donald D. · Inventors: Savard, Donald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
AN IMPROVED PROCESS FOR WELDING PIPE ENDS AND AN INSULATING RING THEREFOR", ABSTRACT OF THE DISCLOSURE An improvement is provided in a known process for welding liquid-filled aligned end sections of pipe. The known process involves positioning a sleeve over the junction between the pipe ends and fillet welding the two ends of the sleeve to the pipe ends. The improvement comprises providing an insulative ring within each pipe end directly beneath the line along which the sleeve's fillet weld is to be applied. The ring is composite in nature being formed of a heat-insulating liquiddisintegratable material coated with a second material which is liquidimpermeable but slowly dissolvable in the …
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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
- Granted February 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2006.
- 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.