Tank for storing liquid products
CA 2259974 C · Owner: Aldyr, Witter (Deceased) · Inventors: Aldyr, Witter (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tank for storing liquid products, particularly a large capacity tank (1) comprises a bottom (5), whose centre (6) is at a level below the level of the , edge of the bottom. Drainage channels (7) consisting of a ramp (8), as floor , with lateral plates (10) as sides, bring the undesirable materials to the edge of the tank where they can be drained out of the tank through drainage tubes.
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 June 19, 1997 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2019.
- 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.