Patents by Inventor Jean-Louis Linossier

Jean-Louis Linossier 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).

  • Heteropolysaccharide solutions stabilized against viscosity loss over temperature and time
    Patent number: 4898819
    Abstract: Aqueous saline solutions of ordered heteropolysaccharides useful, e.g., as displacement fluids in the secondary or tertiary recovery of crude oil from subterranean formations thereof, are stabilized against viscosity loss over temperature and time without adversely affecting the filterability thereof, by purging dissolved oxygen therefrom by degassing same with carbon dioxide, and then treating the degassed solutions with an effective amount of a reducng/deoxidizing agent as to maintain the pH thereof at a value ranging from 5 to 7.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: February 6, 1990
    Assignee: Rhone-Poulenc Specialities Chimiques
    Inventor: Jean-Louis Linossier