Patents by Inventor Du Y. Hsiung

Du Y. Hsiung 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).

  • Neutralizer for permanently waving hair
    Patent number: 4770872
    Abstract: A neutralizer for permanently waving hair containing water, an oxidant and about 0.05 to about 5 weight percent of a hydrolyzed animal protein derivative having quaternary nitrogen groups bonded to the protein amino groups, and a pH value of about 2 to 11. The hydrolyzed animal protein derivative has an isoionic point of at least 9.0 and a viscosity at 10 weight percent solids in water at 25.degree. C. of about 5 to about 40 centipoises.
    Type: Grant
    Filed: February 7, 1984
    Date of Patent: September 13, 1988
    Assignee: Helene Curtis Industries, Inc.
    Inventors: Du Y. Hsiung, Norman L. Edelberg
  • Hair treating method and composition
    Patent number: 4614200
    Abstract: A method of treating hair to strengthen and improve its physical properties and a composition useful therein is disclosed. More particularly, the composition contains polyvalent metal salts and the hair, so treated, is substantially hydrophobic and bodied.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: September 30, 1986
    Assignee: Helene Curtis Industries, Inc.
    Inventors: Du Y. Hsiung, Billye J. Branch, Jayaseelan Rathnam
  • Composition for altering the configuration of hair
    Patent number: 4572220
    Abstract: A hair conditioning composition particularly useful in conjunction with hair waving having a pH value of about 4-9 and containing water having dissolved therein about 0.05-5 weight percent quaternary nitrogen-containing conditioning polymer having a molecular weight of about 10,000-10,000,000, and about 0.5-10 weight percent of a water-soluble disulfide-containing polycarboxylic acid or salt thereof, as well as methods for its use and preparation are disclosed.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: February 25, 1986
    Assignee: Helene Curtis Industries, Inc.
    Inventors: Du Y. Hsiung, Chester A. Davis, Harold J. Nicholson
  • Hair conditioning and composition therefor
    Patent number: 4391286
    Abstract: A hair conditioning composition particularly useful in conjunction with hair waving having a pH value of about 4-9 and containing water having dissolved therein about 0.05-5 weight percent quaternary nitrogen-containing conditioning polymer having a molecular weight of about 10,000-10,000,000, and about 0.5-10 weight percent of a water-soluble disulfide-containing polycarboxylic acid or salt thereof, as well as methods for its use and preparation are disclosed.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: July 5, 1983
    Assignee: Helene Curtis Industries
    Inventors: Du Y. Hsiung, Chester A. Davis, Harold J. Nicholson
  • Hair conditioning waving and straightening compositions and methods
    Patent number: 4175572
    Abstract: A hair conditioner composition for use under highly alkaline conditions comprising an aqueous dispersion containing from about 1 to about 20 weight percent of mineral oil, from about 1 to about 20 weight percent of a fatty alcohol having 12 to 18 carbon atoms, from about 1 to about 15 weight percent of a non-ionic emulsifier, and from about 0.05 to 20 weight percent of a quaternary polymer having recurring units of the formula ##STR1## and compositions and methods for waving or straightening hair employing the above hair conditioner composition and a hair waving or straightening solution containing sufficient sodium hydroxide to provide a pH of about 12 to 13.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: November 27, 1979
    Assignee: Johnson Products Co., Inc.
    Inventors: Du Y. Hsiung, William H. Mueller