Globe valve and method for making same
CA 2126830 C · Owner: M & Fc Holding Company, Inc. · Inventors: Stephens, Leonard J.; Bake, Earl A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve is presented comprising a valve body defining a chamber, a valve stem extending into said chamber a disk, attached to the valve stem, a discrete annular seat movably disposed in the chamber, a resilient ring disposed in the chamber adjacent the annular seat, and a retainer fixed in the chamber on a side of the seat opposite from the ring wherein the ring exercises a bias on the seat in a direction toward the disk, urging the seat into engagement with the disk. The invention further contemplates a method for making the valve.
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 June 27, 1994 and granted July 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2016.
- 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.