Patents by Inventor Marie-Madeleine Besnard

Marie-Madeleine Besnard 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).

  • Mixed polysaccharide precipitating agents and insulating articles shaped therefrom
    Patent number: 5350524
    Abstract: Mixed polysaccharide compositions, well adopted for flocculating/precipitating solid particulates from liquid dispersions thereof and for the shaping of insulating articles therefrom, comprise (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprising glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: September 27, 1994
    Assignee: Rhone-Poulenc Chimie
    Inventors: Marie-Madeleine Besnard, Claire David, Magali Knipper
  • Insulating shaped articles comprising inorganic fibrous matrices and xanthan gum/cationic starch binders
    Patent number: 5290350
    Abstract: Physically/mechanically improved insulating shaped articles such as panels or plates, adapted to withstand very elevated temperatures, comprise an inorganic fiber matrix, e.g., a matrix of ceramic fibers, such inorganic fiber matrix containing at least one inorganic filler material, e.g., a mineral wool and/or kaolin, and a consolidating of a binder therefor which comprises admixture of a xanthan gum and a cationic starch.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: March 1, 1994
    Assignee: Rhone-Poulenc Chimie
    Inventors: Marie-Madeleine Besnard, Fabrice Brenner, Magali Knipper
  • Mixed polysaccharide precipitating agents and insulating articles shaped therefrom
    Patent number: 5221790
    Abstract: Mixed polysaccharide compositions, well adopted for flocculating/precipitating solid particulates from liquid dispersions thereof and for the shaping of insulating articles therefrom, comprise (i) at least one polysaccharide prepared by microbial fermentation, the basic recurring structural unit of which comprising both glucose and rhamnose moieties, and (ii) at least one cationic natural polysaccharide or derivative thereof.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: June 22, 1993
    Assignee: Rhone-Poulenc Chimie
    Inventors: Marie-Madeleine Besnard, Claire David, Magali Knipper
  • Stable suspensions of solid particulates in aqueous media
    Patent number: 4938983
    Abstract: Suspensions of solid particulates in aqueous media, useful, e.g., as thickeners in a wide variety of foodstuff and industrial applications, are sedimentations stabilized by incorporating therein a stabilizing amount of xanthan/carob gum, optionally starch admixture.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: July 3, 1990
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventors: Michel Peignier, Marie-Madeleine Besnard
  • Polysaccharide-thickened aqueous acid cleaning compositions
    Patent number: 4855069
    Abstract: Aqueous acid cleaning compositions well adapted, e.g., for the descaling of metallic face surfaces include (i) water, (ii) a carboxylic acid dissolved therein having a dissociation constant pK, at 25.degree. C., of at least 2, (iii) a stabilizing amount of at least one salt of an acid having a pK value of at least 2, and of a strong base, and (iv) a thickening amount of a polysaccharide.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: August 8, 1989
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Luc Schuppiser, Marie-Madeleine Besnard