Energy recovery device
CA 2328031 A1 · Owner: Calder Limited · Inventors: Elliott-Moore, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An energy recovery device comprises at least one cylinder a piston slidable, in the cylinder, first valve means for selectively connecting one end of the cylinder to, waste liquid at a first relatively high pressure and to drain and second valve means for, allowing feed liquid to enter the other end of the cylinder at a second lower pressure, via a feed liquid entry port and to be discharged via a feed liquid discharge port from, said other end of the cylinder in response to movement of the piston caused by waste, liquid entering said one end of the cylinder. Also means, such as a rod which , extends, from the other end of the cylinder and into but not through the piston ensures that …
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 December 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2022.
- 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.