Valve and improved seat seal therefor
CA 2023552 C · Owner: Cooper Cameron Corporation · Inventors: Stroud, Daryl Richard Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved seal ring for sealing across the annular space between the exterior of a seat ring and the inner surface of a counterbore recess surrounding the entry of either the inlet or outlet into the valve chamber within the valve body the seal, ring including a pair of radially extending flanges connected by a tubular connector extending between the radial midportions of the flanges and the leading flange having inner and outer sealing surfaces which provide a high interference fit seal between the recess inner surface and the seat ring outer surface and the trailing flange having inner and outer sealing surfaces which provide a low interference fit seal between the recess inner surface …
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 August 17, 1990 and granted May 7, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2012.
- 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.