Drainage apparatus and method of use of the same
CA 2269343 A1 · Owner: Byer, Gerald Ambrose · Inventors: Byer, Gerald Ambrose
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drainage apparatus includes a container having a bottom and an interior surface. A piston is disposed in the container. The piston has a peripheral seal in sealing engagement with the interior surface of the container. A handle is secured to the piston. The piston is movable by grasping the handle and exerting a force to move the piston away from the bottom. A flow passage extends through the bottom of the container. A flexible hose is secured to the bottom of the container in fluid communication with the flow passage. The flexible hose is positioned in areas inaccessible to bailing and then the piston moved to draw liquid up the hose and into the container.
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 April 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2021.
- 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.