Patents by Inventor Daniel Litvine

Daniel Litvine has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Continuous synthesis of mercaptocarboxylic acid esters
    Patent number: 5095138
    Abstract: The invention relates to production of esters of mercaptocarboxylic acids and alcohols forming an azeotrope with water.The esterification is carried out continuously in the presence of an excess of alcohol and the water formed is removed by entraining azeotropically under vacuum at a temperature such that the residual water concentration in the reaction mixture remains constantly below 0.5% by weight.The process according to the invention applies more particularly to the synthesis of octyl esters of thioglycolic acid.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: March 10, 1992
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventors: Yves Labat, Jean-Pierre Muller, Daniel Litvine