Method of and device for temporarily inserting a device into a buried pipeline
CA 2080060 A1 · Owner: Pfeiffer, Dominique · Inventors: Wartel, Christian; Lasserre, Pierre; Pfeiffer, Dominique
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and a device for temporarily inserting an apparatus into a buried pipeline, the device comprising a quill to be inserted into a borehole and comprising a lock at its top part, expansible chambers associated with the inner wall of the quill and a head mounted at the bottom part of the quill to provide a sealed connection between the latter and a pipeline buried in the ground and in which an apparatus should be temporarily inserted via the quill.
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 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 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.