Cone shaped flocculation tank
CA 2099554 C · Owner: Kallis, Lyle Grant · Inventors: Kallis, Lyle Grant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When drilling wells a drill fluid is used to lubricate the drill bit and remove the drilled out material from the bottom of the drill hole. In this invention a partly cylindrical and partly conical vertical tank capable of being moved from site to site permits the contaminated drill, fluid to be cleaned for re-use in the drilling operation thereby permitting, less drill fluid to be used in each drilling operation. The contaminated drill fluid is introduced into the tank at its middle through an input, centrifuge pipe which enlarges and circles the inside of the tank. The centrifuge pipe has slots along its bottom. As the contaminated drill fluid is pumped into the tank the drilled out …
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 July 2, 1993 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.