Expired Canadian patentCanada
Process for the distillation of alcohols
CA 2213614 C · Owner: Gick, Wilhelm · Inventors: Zgorzelski, Wolfgang; Schalapski, Kurt; Gick, Wilhelm
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention pertains to a method of distillatory purification of C3-C10 alcohols wherein the alcohols are distilled at 150 to 200~ C in the presence of 10 to 1000 ppm hydroxide alkali.
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 February 14, 1996 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 14, 1996
GrantedJuly 3, 2001
Term endedFebruary 14, 2016
Patent numberCA 2213614 C
Classification (IPC)C07C31/12 +2 more
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.