Low profile discharge check valve
CA 2236767 C · Owner: Jones, Charlie E. · Inventors: Jones, Charlie E.; Dossaji, Murtaza R.; Kazakis, Michael V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A low profile valve for discharging pressurized air to a system for utilizing such pressurized air. The valve includes a housing for mounting in or to an associated structure and, has at least one opening through which pressurized air is directed to and from the valve. A piston is located in the housing for axial movement therein, and the piston has a face portion containing a seal for sealing the piston against a fixed surface of the associated structure. In addition a, spring can be located about the piston for biasing the piston in the direction of the fixed 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 May 6, 1998 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2020.
- 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.