Multifunctional batch type distillation
CA 2021445 A1 · Owner: Kim, Ju H. · Inventors: Kim, Ju H.; Kim, Ju H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing the raw materials of special lubricating oil such as Mineral spirit Dry cleaning solvent, Rolling oil, Rust prevention oil Drawing fluid, and Cutting, fluid. The process uses only one distillation tower with a 26 sieve tray as a batch type system and uses the petroleum fractions (kerosene and gasoline) and lubricating oil fractions (raw lubricating oil, lube base oil, and used lube oil) quite freely.
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 18, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2012.
- 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.