Method and apparatus for dispersing gas into liquid
CA 2108522 C · Owner: Leiponen, Matti Olavi · Inventors: Leiponen, Matti Olavi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for dispersing gas into liquid or slurry which uses a rotatable rotor at least partly submerged in the liquid and havingblades connected thereto. The gas to be dispersed is conducted via a gas conduit to the inside of the rotor and further to the surrounding liquid or slurry through at least one discharge aperture formed in the rotor blade and being adjustable in width.
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 15, 1993 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.