Patents by Inventor Augustine Liu

Augustine 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).

  • Cleaning composition
    Patent number: 6849589
    Abstract: Improved cleaning compositions are described that are efficient in removing both food and industrial grease, heel marks, and the like from hard surfaces, wherein improved cleaning compositions contain certain nonionic surfactants and quaternary amine salts, when combined with a slightly water-soluble polar organic compound that have a surprising synergistic effect resulting in a marked improvement in the removal of hydrocarbon-containing soils as shown by decreased soaking times required for soil removal.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: February 1, 2005
    Assignee: 3M Innovative Properties Company
    Inventor: Augustine Liu
  • Cleaning composition
    Publication number: 20030114341
    Abstract: Improved cleaning compositions are described that are efficient in removing both food and industrial grease, heel marks, and the like from hard surfaces, wherein improved cleaning compositions contain certain nonionic surfactants and quaternary amine salts, when combined with a slightly water-soluble polar organic compound that have a surprising synergistic effect resulting in a marked improvement in the removal of hydrocarbon-containing soils as shown by decreased soaking times required for soil removal.
    Type: Application
    Filed: October 10, 2001
    Publication date: June 19, 2003
    Applicant: 3M Innovative Properties Company
    Inventor: Augustine Liu
  • Aqueous cleaning composition including a nonionic surfactant and a very slightly water-soluble organic solvent suitable for hydrophobic soil removal
    Patent number: 5922665
    Abstract: A composition capable of removing hydrophobic soils is provided that includes a nonionic surfactant; a very slightly water soluble organic solvent; water; and an optional additive. Improved hydrophobic soil removal is achieved wherein an amount of the slightly water soluble solvent with respect to an amount of the surfactant is sufficient to achieve a haze point in the composition.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: July 13, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Augustine Liu
  • Hard surface cleaning compositions including a very slightly water-soluble organic solvent
    Patent number: 5744440
    Abstract: Cleaning compositions are presented which surprising exhibit increased cleaning performance as the amount of solubilizing coupler is increased beyond that necessary to fully solubilize a very slightly water-soluble organic solvent component. Methods of use of the compositions to remove hydrophobic soils and soap scum are also described.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: April 28, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Augustine Liu
  • Cleaning compositions based on N-alkyl pyrrolidones having about 8 to about 12 carbon atoms in the alkyl group and corresponding methods of use
    Patent number: 5503778
    Abstract: Cleaning compositions are presented which surprising exhibit increased cleaning performance as the amount of solubilizing coupler is increased beyond that necessary to fully solubilize a very slightly water-soluble organic solvent component. Methods of use of the compositions to remove hydrophobic soils and soap scum are also described.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: April 2, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Augustine Liu, Jerry W. Mlinar