Method of producing a hermetic tubular joint comprising local and initial added thickness(es), by means of plastic expansion
CA 2547031 C · Owner: Dubedout, Laurent · Inventors: Dubedout, Laurent; Verger, Eric; Duquesne, Benoit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an expandable tubular joint comprising: (i) a male tubular element (EM) which is equipped with a male thread (FM) a first annular lip (LI) having a first axially abutting surface (SB1) a first inner surface (SI1) and a first outer surface (SE1) and a second abutting surface (SB2); and (ii) a female tubular element (EF) which is equipped with a female thread (FF) a second annular lip (L2) having a third abutting surface (SB3) a second outer surface (SE2) and a second inner surface (SI2) and a third inner surface (S13) and a fourth axially abutting surface (SB4) which together with the second outer surface (SE2) defines a first annular housing (LO) homologous to 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
- Filed November 23, 2004 and granted October 2, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.