Process for refining soap-containing crude polyol fatty-acid polyester reaction products
CA 2032677 A1 · Owner: Unilever Plc · Inventors: Wolf, Frederick D. B.; Rosier, Otto E.; Zwanenburg, Arend
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention pertains to a process for refining soapcontaining crude polyol fatty-acid polyester reaction product comprising the step of contacting the crude reaction product with an aqueous acid solution to substantially convert the soap into its corresponding free fatty acids, the subsequent step of drying said crude reaction product to substantially remove any free-water therein and the step of substantially removing from the dried crude reaction product any salts therein.
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 December 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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.