Explosive pipe crimping method and devices
CA 2067065 A1 · Owner: Hudak, David Bruce Nesseth · Inventors: Mcquilkin, Andrew; Ritzel, David V.; Hudak, David Bruce Nesseth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
EXPLOSIVE PIPE CRIMPING METHOD AND DEVICES" ABSTRACT OF THE DISCLOSURE, A main charge of explosive is positioned symmetrically about a passageway-forming tubular member such as a well pipe, assembly. The charge is outwardly and radially spaced from the member and is coupled thereto by a dense medium such as soil, which is adapted to transfer the produced explosive energy to the tubular member in the form of a pressure pulse applied by the medium. Initiation charges are supplied at the outer surface of the main charge, to initiate a detonation wave directed at the tubular member. A layer of dense medium is provided to confine the non-coupled surface of the charge and retard venting of …
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.
Why it's free to use
- Filed April 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 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.