Method and apparatus for sealing at a sliding interface
CA 2063515 A1 · Owner: Baker Hughes Incorporated · Inventors: Ross, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seal is provided for containing fluid (either gaseous or liquid fluids) under variable pressure in a pressurized region to prevent leakage into a less pressurized region. First and second interfacing seal members are provided and adapted to slidably engage one another at an interface region during makeup of the seal apparatus. A seal region is carried by the first seal member at the interface region and composed of a deformable material. A seal bead is carried at the interface region by the second seal member and protrudes therefrom. The seal bead is composed of a material less malleable than the seal region for seating in the seal region. At least a portion of the second seal member …
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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 March 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 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.