Pulsating liquid jet apparatus
CA 2047291 A1 · Owner: Spartan Tool · Inventors: Salecker, Roy W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve unit for producing pulsed delivery of a fluid from a supply to a point of use. The valve unit consists of: a valve housing defining a main fluid chamber and inlet and outlet openings communicating with the main fluid chamber; a piston movable between first and second positions within the main fluid chamber for blocking incoming fluid flow from the inlet opening through the main fluid chamber to the outlet opening with the piston in its first position and for allowing free communication of incoming fluid flow from the inlet opening through the main fluid chamber to the outlet opening with the piston means in its second position; structure for repetitively moving the piston back and …
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 July 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2013.
- 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.