Spherical seat inlet-exhaust valve
CA 2496762 A1 · Owner: Ho, Thanh · Inventors: Herbst, Robert J.; Johnson, Duane R.; Ho, Thanh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inlet/exhaust valve having a cylindrical portion (50) with a cavity therethrough for use in a pneumatic control valve is disclosed. The inlet/exhaust valve has at least two seats (60 62), one of which is on an , inner diameter of the cylindrical portion (50) and the other (60) of which is on an outer diameter of the cylindrical portion. Both seats are rounded for self-aligning seating with corresponding seating surfaces (61 72).
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 25, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 2025.
- 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.