Process for the synthesis of cationic surfactants derived from the condensation of fatty acids with esterified basic-character amino acids and their application as antimicrobial agents
CA 2185165 C · Owner: Infante Martinez-Pardo, Marta Rosa · Inventors: Contijoch Mestres, Agustin; Infante Martinez-Pardo, Marta Rosa; Erra Serrabasa, Pilar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process comprises a first step of, esterification of an amino acid and is characterized in, that, in a second step the condensation takes place of a, fatty acid chloride with an esterified amino acid derivative. It relates to the synthesis of cationic type surfactant compounds consisting of natural basic-character amino acids (and any of their homologs) suitably modified for the purpose of obtaining products having specific applications as antimicrobial (biocidal) agents. Nontoxic reaction media and catalysts are used and a final product free from impurities is obtained. The cost is reduced due to the use of cheaper starting materials and simpler equipment.
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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 March 8, 1995 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2017.
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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.