Patents by Inventor Do Le Trung

Do Le Trung 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).

  • Cosmetic agents based on polycationic polymers, and their use in cosmetic compositions
    Patent number: 4702906
    Abstract: A shampoo composition contains in an aqueous carrier a quaternized polymer and a detergent.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: October 27, 1987
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Bernard Jacquet, Gerard Lang, Alain Malaval, Serge Forestier, Do Le Trung
  • Hair treatment compositions based on polycationic polymers
    Patent number: 4517174
    Abstract: A hair dye or hair bleaching composition contains in an aqueous carrier a quaternized polymer.
    Type: Grant
    Filed: September 21, 1983
    Date of Patent: May 14, 1985
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Bernard Jacquet, Gerard Lang, Alain Malaval, Serge Forestier, Do Le Trung
  • Cosmetic agents based on polycationic polymers, and their use in cosmetic compositions
    Patent number: 4411884
    Abstract: A hair shaping cosmetic composition contains in an aqueous, alcoholic or hydoalcoholic carrier a quaternized polymer.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: October 25, 1983
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Bernard Jacquet, Gerard Lang, Alain Malaval, Serge Forestier, Do Le Trung
  • Ionene polymer and preparation thereof
    Patent number: 4395541
    Abstract: Ionene polymers have been prepared and have been found to be useful in cosmetic compositions for the treatment of the hair and skin, or in the treatment of natural or synthetic textile fibers.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: July 26, 1983
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Bernard Jacquet, Gerard Lang, Alain Malaval, Serge Forestier, Do Le Trung
  • Polycationic polymers and their preparation
    Patent number: 4390689
    Abstract: Polycationic polymers have been prepared and have been found to be useful in cosmetic compositions for the treatment of the hair and skin, or in the treatment of natural and synthetic textile fibers. These polymer comprise units of the formula ##STR1## .
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: June 28, 1983
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Bernard Jacquet, Gerard Lang, Alain Malaval, Serge Forestier, Do Le Trung
  • Cosmetic agents based on cationic polymers, cosmetic compositions containing the same and the use of said cosmetic agents
    Patent number: 4390522
    Abstract: A cosmetic composition for application to the hair, skin or nails comprises in a cosmetic vehicle selected from water, a lower alkanol or a dilute lower alkanol solution, 0.01 to 15 percent by weight of a cationic polymer having units of the formula ##STR1## said polymer having a molecular weight between 1,000 and 50,000. R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represent alkyl or hydroxyalkyl wherein the alkyl of each has 1-20 carbon atoms. A is alkylene, hydroxyalkylene, --(CH.sub.2).sub.n --Z--(CH.sub.2).sub.n -- wherein Z is oxygen and n is a whole number ranging from 2-10, or --EO).sub.m.sbsb.1 (DO.sub.m D.sub.1 wherein E is alkylene or hydroxyalkylene containing 1-5 carbon atoms, m.sub.1 is 0 or 1, m is 1-600 with the proviso that m is greater than 1 when m.sub.1 =0. D.sub.1 represents E when m.sub.1 =1 and D.sub.1 represents D when m.sub.1 =0. B represents --EO).sub.m.sbsb.1 (DO).sub.m D.sub.1 wherein E, D, D.sub.1, m and m.sub.1 are defined above X.sup..crclbar.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: June 28, 1983
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Bernard Jacquet, Gerard Lang, Alain Malaval, Serge Forestier, Do Le Trung