Method for production of alkyl esters
CA 2507329 A1 · Owner: Anderson, Colin Arthur · Inventors: Anderson, Colin Arthur; Muskett, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for production of alkyl esters from a mixture of glycerides and free fatty acids, originating primarily from grease trap waste is provided. The , mixture is first solvated in a low boiling point alcohol and then the pH of the solution is adjusted to about 1 to 2 by addition of an acid to effect acidcatalysed alkyl esterification. The acidic solution is then treated with a concentrated alkoxide solution to raise the pH of the solution about pH12 to effect base-catalysed transesterification of glycerides contained in the mixture. The resulting solution is then treated with an acid to decrease the pH of the solution to about 2 to effect acid-catalysed esterification of residual …
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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 November 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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
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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.