Patents by Inventor Claudine Lapoiriere

Claudine Lapoiriere 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).

  • One step process for preparing cross-linked poly-.beta.-alanine microspheres from acrylamide and a copolymerisable polyfunctional compound
    Patent number: 5077058
    Abstract: A one-step process for preparing cross-linked poly-.beta.-alanine as microspheres having narrow size distribution comprises polymerizing acrylamide with a polyfunctional compound copolymerizable with acrylamide (with the polyfunctional compound also acting as the cross-linking agent) in an organic solvent or a mixtured such solvents in the presence of an ionic polymerization initiator and a suspension agent. The resulting microspheres may be impregnated with a pharmaceutically or cosmetically active substance.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: December 31, 1991
    Assignee: L'Oreal
    Inventors: Claudine Lapoiriere, Claude Mahieu, Christos Papantoniou
  • Cosmetic makeup compositions containing crosslinked poly .beta.-alanine microspheres impregnated with polyhydric alcohol
    Patent number: 5034217
    Abstract: An anhydrous cosmetic makeup composition for the lips and skin contains crosslinked poly .beta.-alanine microspheres impregnated with a polyhydric alcohol.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: July 23, 1991
    Assignee: Societe Anonyme dite: "L'Oreal"
    Inventors: Beatrice DeFrossez, Rose-Marie Handjani-Vila, Claudine Lapoiriere, Claude Mahieu, Christos Papantoniou, Jean-Claude Ser
  • Process for the preparation of crosslinked poly .beta.-alanine in the form of microspheres
    Patent number: 4927883
    Abstract: A process for preparing crosslinked poly .beta.-alanine in the form of microspheres comprises (a) polymerizing acrylamide in a tert. butanol/toluene solvent mixture in the presence of a polymerization initiator and an octadecene-maleic anhydride copolymer as a suspension agent; (b) submitting the resulting suspension of poly .beta.-alanine to a crosslinking reaction using a dialdehyde as the crosslinking agent; and (c) isolating the crosslinked poly .beta.-alanine microspheres. These microspheres exhibit a low size dispersity.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: May 22, 1990
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Claudine Lapoiriere, Claude Mahieu, Christos Papantoniou
  • Cosmetic composition containing a polycondensate
    Patent number: 4595585
    Abstract: A cosmetic composition contains a polycondensate having units of the formula ##STR1## wherein t is 0 or 1. When t=1, R.sub.1 and R'.sub.1 each independently represent linear or branched alkylene having 1-38 carbon atoms optionally interrupted by --CONH-- or --CO--; alkenyl or alkynyl having 2-18 carbon atoms; cycloalkylene having 5-6 carbon atoms; arylene or bis-arylene optionally substituted by alkyl or alkoxy; or a divalent radical of the formula, --CHR'--O--C.sub.2 H.sub.3 (R')--O].sub.n HCR'-- wherein n is 0-20 and R' represents hydrogen or methyl, and R.sub.2, R'.sub.2, R.sub.3 and R'.sub.3 each independently represent --COOR.sub.4, --CN, --CONH.sub.2 or --COCH.sub.3, wherein R.sub.4 represents hydrogen, linear or branched alkyl having 1-18 carbon atoms or cycloalkyl having 5-6 carbon atoms.
    Type: Grant
    Filed: April 17, 1984
    Date of Patent: June 17, 1986
    Assignee: L'Oreal
    Inventors: Christos Papantoniou, Jean Mondet, Claudine Lapoiriere ex. spouse Vandenbossche