Self-locking, high pressure service stopper
CA 2444067 A1 · Owner: Bond, Jeffrey Clinton · Inventors: Hutton, William Michael; Bond, Jeffrey Clinton; Ahner, Michael David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-locking, high-pressure stopper is disclosed. Also disclosed is a method of, using the stopper. The stopper allows a branch pipe to be plugged from above ground, using an elongated insertion tool. The self-locking stopper of the present invention, includes a body having O-ring seals that is inserted into the branch pipe that is to be, plugged. The self-locking stopper has outwardly biased locking tabs that are provided, to engage a shoulder or step in the branching pipe in order to prevent the stopper from, being pulled out, or pushed out by fluid pressure once it is in place. The , stopper, system also includes a flanged insertion pipe used for inserting the stopper into 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 October 9, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2025.
- 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.