Patents by Inventor Mark H. K. Mao

Mark H. K. Mao 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).

  • Detergent composition containing polyhydroxy fatty acid amide and alkyl ester sulfonate surfactants
    Patent number: 5454982
    Abstract: Disclosed is a detergent composition comprising at least about 1% by weight, preferably at least about 3%, of a polyhydroxy fatty acid amide surfactant of the formula: ##STR1## wherein R.sup.1 is H, C.sub.1 -C.sub.4 hydrocarbyl, 2-hydroxy ethyl, or 2-hydroxy propyl, R.sup.2 is C.sub.7 -C.sub.31 hydrocarbyl, and Z is polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or alkoxylated derivatives thereof; and at least about 1%, by weight, preferably at least about 3%, of an alkyl ester sulfonate surfactant of the formula: ##STR2## wherein R.sup.3 is C.sub.8 -C.sub.20 hydrocarbyl, R.sup.4 is C.sub.1 -C.sub.6 hydrocathyl, and M is a soluble salt-forming cation.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: October 3, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Bruce P. Murch, Mark H. K. Mao
  • Comprising anionic surfactant polymeric nonionic surfactant and betaine surfactant
    Patent number: 5167872
    Abstract: High sudsing liquid detergent compositions contain anionic surfactant, polymeric surfactant which contains either linkages and a betaine surfactant for improved grease handling.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: December 1, 1992
    Assignee: The Procter & Gamble Company
    Inventors: Eugene J. Pancheri, Mark H. K. Mao
  • Detergent composition containing semi-polar nonionic detergent alkaline earth metal anionic detergent and amino alkylbetaine detergent
    Patent number: 4681704
    Abstract: A detergent composition containing a semi-polar nonionic detergent, an alkaline earth metal salt of an anionic detergent, and an amidoalkylbetaine. The composition is especially useful for the removal of greasy soils and has good suds mileage.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: July 21, 1987
    Assignee: The Procter & Gamble Company
    Inventors: Lowell W. Bernardino, Edward W. Kuhl, Mark H. K. Mao, Eugene J. Pancheri
  • Mild detergent compositions
    Patent number: 4555360
    Abstract: Mild detergent compositions comprise mild, water soluble, foaming anionic detergent surfactants and a mixture of small amounts of betaine surfactant and amine oxide suds booster.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: November 26, 1985
    Assignee: The Procter & Gamble Company
    Inventors: Donald L. Bissett, Mark H. K. Mao
  • Foaming surfactant compositions
    Patent number: 4536317
    Abstract: An agglomerated light-duty detergent granule composition containing an alkylpolysaccharide surfactant, an alkylbenzene sulfonate cosurfactant, an alkylpolyethoxylate sulfate cosurfactant and a water soluble inorganic salt.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: August 20, 1985
    Assignee: The Procter & Gamble Company
    Inventors: Ramon A. Llenado, Mark H. K. Mao, Denzel A. Nicholson
  • Polar solvent extraction of colored materials from alkylsaccharides under essentially anhydrous conditions
    Patent number: 4483979
    Abstract: A process for removing colored materials from alkylpolysaccharides by extracting the colored materials with polar solvents under essentially anhydrous conditions.
    Type: Grant
    Filed: December 8, 1982
    Date of Patent: November 20, 1984
    Assignee: The Procter & Gamble Company
    Inventor: Mark H. K. Mao
  • Process of preparing alkylpolysaccharides
    Patent number: 4393203
    Abstract: Long chain fatty alcohols can be removed from alkylpolysaccharide products in thin film evaporators to achieve fatty alcohol levels of less than about 2% without excessive discoloration of the alkylpolysaccharide.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: July 12, 1983
    Assignee: The Procter & Gamble Company
    Inventors: Mark H. K. Mao, Larry E. Miller, John M. Weeman