Wellhead joint and sealing ring
CA 2016750 C · Owner: Cooper Cameron Corporation · Inventors: Szymczak, Edward J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The improved joint of the present invention includes a wellhead housing and its complementary member forming the joint and they include surfaces which taper both inwardly and away from the joint surfaces together with straight cylindrical sealing surfaces extending away from the inner end of the tapered surfaces. One form of improved seal includes a sealing ring having a tubular body with an external flange or hub to be clamped between the joint surfaces of the joint members tapered, external surfaces which mate with and provide a tight sealing engagement with the tapered surfaces of the joint members and tubular rims extending away from the tapered surfaces and having sufficient length to …
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 May 14, 1990 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 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.