Union joint
CA 2029311 C · Owner: Sanko Kogyo Kabushiki Kaisha · Inventors: Miyashita, Tomio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A union joint capable of perfectly hermetically connecing pipes so that a gas passing the pipes never leaks from the junction of the pipes even if the pressure of the gas is as high as 150 kg/cm2. The union joint comprises a first sleeve (10) hermetically joined to a pipe (1), a second sleeve (20) hermetically joined to another pipe (2) to be connected to the pipe joined to the first sleeve (10), one or a plurality of metallic gaskets (30) placed between the respective sealing surfaces (15; 25) of the first and second sleeves (10; 20) so as to be compressed between the sealing surfaces (15; 25) of the first and second sleeves (10; 20) when the first and second sleeves (10; 20) are drawn …
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 November 5, 1990 and granted January 7, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 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.