Improving the color of surfactant agglomerates by admixing a solid bleaching agent
CA 2095037 C · Owner: Vega, Jose L. · Inventors: Goovaerts, Lucas; Vega, Jose L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for manufacturing improved color surfactant agglomerates, particularly compris ing methyl ester sulfonates. for use in detergent compositions said process , comprising sulfonation of methyl ester digestion of, the sulfonation product. esterification of said sulfonated product to produce an acid product and agglomeration of said acid pro duct, characterized in that said acid product is exposed to a solid bleaching agent immediately prior to or during agglomeration of said acid product.
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 October 21, 1991 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2013.
- 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.