Purification of organic solvents
CA 2465513 A1 · Owner: Honeywell International Inc. · Inventors: Snoble, Karel A. J.; Chen, Shihan; Bershitsky, Alexander M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to processes for producing a high purity organic solvent from a crude organic solvent comprising providing a stream of crude organic solvent comprising a frist amount of at least one impurity and adsorbing at least one impurity contained in said crude organic solvent onto an adsorbent to produce a purified organic solvent comprising a second amount of impurities, the second amount of impurities being less than the first amount of impurities.
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 31, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2024.
- 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.