Tubular joint
CA 2005677 C · Owner: Cameron Iron Works Usa, Inc. · Inventors: Szymczak, Edward J.; Chin, Arthur H. T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved tubular joint including an inner tubular member, an outer tubular member having a central bore therethrough, a counterbore extending from the open end of the counterbore and terminating in a shoulder between the counterbore and the central bore, and internal threads on the outer end of the counterbore, a sleeve positioned within the counterbore, a retainer ring threaded into the counterbore threads and retaining the sleeve within the counterbore, ribs on the interior of the sleeve and a seal between the exterior of the sleeve and the interior of the counterbore so that pressure forming of the inner tubular member forms it into tight gripping and sealing engagement with 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 15, 1989 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2011.
- 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.