Fail-safe coupling for a latch assembly
CA 2248287 C · Owner: Dresser Industries, Inc. · Inventors: Comeau, Laurier E.; Gillis, Ian G.; Vandenberg, Elis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fail-safe tubular receiving member for use in combination with a latch assembly to longitudinally support and rotationally orient the latch assembly in a wellbore. The latch assembly includes at least one outwardly biased, radially movable latch member which is receivable within a bore of the receiving member. A first recessed area and a second recessed area accessible, from the first recessed area are defined by the bore. The first recessed area defines a first increased radial distance and is configured so that upon longitudinal alignment of the latch member and the first recessed area the , latch, member moves radially outward for receipt in the first recessed area to support, 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 September 22, 1998 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2020.
- 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.