Drain flushing device
CA 2109485 C · Owner: Pingiotti, Ercolano · Inventors: Pingiotti, Ercolano
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drain flushing device for allowing a user to unclog a drain in either of two modes. The user is given the option to either use the device as a liquid column guide or as a pump. A drain flushing device in accordance with a first embodiment of the present invention. The drain flushing device has a substantially cylindrical body and a piston element adapted to reciprocate inside the cylinder. The cylinder has a lower discharge aperture and an upper aperture with a upper peripheral rim. A substantially funnel-shaped liquid guide extends integrally from the cylindrical body adjacent its upper aperture. The funnel shaped liquid guide has a peripheral wall which merges into the cylindrical body …
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 October 28, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2015.
- 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.