Process and apparatus
CA 2045548 A1 · Owner: Mckinley, Donald H. · Inventors: Scarlett, John; Wood, Michael A.; Mckinley, Donald H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Esterification is carried out in a column reactor (14) in which there is a plurality of esterification trays (15) each having a predetermined liquid hold-up and containing a charge of a solid esterification catalyst thereon, e.g. an ion exchange resin containing -SO3H and/or -COOH groups. A liquid phase containing the carboxylic acid component, e.g. a fatty acid mixture flows down the, column reactor from one esterification tray to the next downward one against an upflowing alcohol vapour stream e.g. methanol, vapour. Relatively dry alcohol vapour is injected (21) into the bottom of the column reactor. Water of esterification is removed from the top of the column reactor in the vapour …
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 January 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 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.