Flush rolled joint
CA 2032810 A1 · Owner: Mann, John Walter · Inventors: Hunter, Terry A.; Mann, John Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure There is disclosed an elongated pressure tube suitable for use in a nuclear fuel channel. In this environment, pressurized water passes through the pressure tube extracting heat from fuel bundles carried in the pressure tube. The pressure tube has an upstream end portion that is adapted to have its outer surface roll joined to an inside surface of an end fitting of dissimilar material. The inside surface of the end fitting has a plurality of recessed grooves contained therein to facilitate the rolled joint. The upstream end portion of the pressure tube initially has a greater wall thickness and a smaller inside wall surface diameter than the remainder of the …
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 December 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2012.
- 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.