Thrust ring for pipe joints
CA 2065777 C · Owner: Fujikin Incorporated · Inventors: Yamaji, Michio; Masuda, Naoya; Ikeda, Nobukazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe joint thrust ring to be interposed between a joint member of a pipe joint and a connecting threaded member rotatably fitted to the joint member. The thrust ring comprises a C-shaped body in the form of a circle partly cut away and having spring elasticity. The inner width between opposed ends of the C-shaped body is maller than the outside diameter of the joint member and can be increased to a value equal to the outside diameter of the joint member.
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 April 10, 1992 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2014.
- 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.