Valve insertion method and assembly for inserting a valve in a line
CA 2217285 C · Owner: Maichel, Jeffrey L. · Inventors: Maichel, Jeffrey L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for inserting a valve in a line includes the step of providing a valve assembly (10) having a valve body (11) with two sections (17 18) , adapted to be assembled over an existing pipe (14) and gate (12) adapted to cut through the pipe (14) as the gate (12) advances from an open position toward a closed position. The method proceeds by installing the valve assembly (10) on the existing pipe (10) with the gate (12) in the open position and then moving the gate (12) toward the closed position to thereby cut through the pipe (14). A rotatable pipe-cutter version of a valve assembly (10) constructed according to the invention includes at least one cutting tooth (21) and the …
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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 February 20, 1997 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2019.
- 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.