Patents by Inventor Leo Z. Liu

Leo Z. Liu 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).

  • Publication number: 20150166836
    Abstract: A mild, simple process of preparing lignin nanoparticle dispersions is disclosed. Additionally, compositions and methods of making lignin nanoparticle-polymer complexes comprising derivatized and/or non-derivatized lignin nanoparticle dispersions and water soluble and/or water dispersible polymers are disclosed. Further, methods of using at least one of the lignin nanoparticle dispersions, derivatized lignin nanoparticle dispersions, and/or the lignin nanoparticle-polymer complex to impart rinse-resistant properties, such as hydrophilic properties, to substrates, or function as tunable nanoparticle surfactants are disclosed.
    Type: Application
    Filed: December 12, 2014
    Publication date: June 18, 2015
    Inventors: Leo Z. Liu, John C. Gast, Kyle J. Bottorff
  • Patent number: 7064232
    Abstract: The invention relates to the preparation of hydrophobic modified diquaternary cationic monomers and their copolymer as well as the use such monomers and copolymers as thickening agents/rheology modifiers for acidic compositions. The hydrophobic modified diquaternary cationic monomer having the general formula: wherein X is selected from O, NH, or NR; Y is any alkyl, alkylene with or without heteroatoms, and R0, R1, R2 R3, R4, which are identical or different, are selected from C1–C4 alkyl groups, R is selected from any alkyl group with or without heteroatoms, and R5 is a hydrphobe having an alkyl chain of more than 4 atoms.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: June 20, 2006
    Assignee: Rhodia Inc.
    Inventors: Leo Z. Liu, Jeanne Chang