Process for the purification of esters
CA 1189085 A · Owner: Hoechst Aktiengesellschaft · Inventors: Stuhler, Herbert; Krempl, Engelbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the purification of esters which, contain residues of dissolved and/or undissolved alcohols is described. The purification of the esters containing alcohols is achieved by treating the esters in the liquid, state, with an effective amount of water-soluble polysaccharide derivatives in the solid state.
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
- Granted June 18, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2002.
- 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.