Inflatable packing device and method of sealing
CA 2049686 C · Owner: Mody, Rustom K. · Inventors: Mody, Rustom K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inflatable packing device is provided for use i,n wellbore containing fluid. The inflatable packing device provides a seal between a conduit carrying the inflatable packing device and an interior surface within the wellbore. A cylindrical housing is provided having a central longitudinal axis and, including upper and lower collar members. A means for securing the cylindrical housing to the conduit is provided. An annular inflatable wall with upper and lower ends is secured to the upper and lower collar members respectively, with the annular inflatable wall disposed over at least a portion of the cylindrical housing. The annular inflatable wall includes an inner elastomeric sleeve covered …
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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 August 22, 1991 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2013.
- 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.