Patents by Inventor Louis F. Wong

Louis F. Wong 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).

  • Patent number: 5202048
    Abstract: Personal cleansing compositions containing surfactant and selected cationic polymer provide products having improved odor stability. This "bulky amine" cationic polymer is: Guar (POLYMER)-CR.sup.1 HCR.sup.2 R.sup.3 --CH.sub.2 NR.sup.4 R.sup.5 R.sup.6 wherein R.sup.1 -R.sup.3 is a --H or --OH substituent, and wherein at least one of R.sup.4, R.sup.5 and R.sup.6 are selected from the group consisting of alkyl having a chain length of from about 2 to about 24 carbon atoms, and alkoxy alkyl containing from about 2 to about 12 carbon atoms, and mixtures thereof. The cationic polymer is less odoriferous than trimethylamine-based cationic polymers. The personal cleansing composition ash a pH of at least 7.5 in a 1% aqueous solution.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: April 13, 1993
    Assignee: The Procter & Gamble Company
    Inventors: Robert G. Bartolo, Louis F. Wong
  • Patent number: 4800026
    Abstract: This invention relates to fabric care compositions comprising curable amine functional silicones for wrinkle reduction.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: January 24, 1989
    Assignee: The Procter & Gamble Company
    Inventors: Timothy W. Coffindaffer, Louis F. Wong
  • Patent number: 4755354
    Abstract: A method of automatic brushless removal of existing soil and long term maintenance cleaning of flush toilet bowls with bromide activated hypochlorite salts. A solution which yields hypochlorite ions in a concentration of 30 to 100 ppm, and bromide ions in a concentration of 0.1 to 20 ppm is dispensed into the toilet bowl with each flush.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: July 5, 1988
    Assignee: The Procter & Gamble Company
    Inventors: Toan Trinh, Louis F. Wong
  • Patent number: 4729880
    Abstract: An article for sanitizing toilets comprising a dosing dispenser with a calcium hypochlorite cake composition characterized in that the article is designed (when used) to dispense from 1 ml to 4 mls of a 5% to 15% liquid bleach over the life of the article. When in use, the article is designed to maintain a reserve of liquid bleach in the dispenser wherein the reservoir to dose volumetric ratio of 3:1 to 6:1.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: March 8, 1988
    Assignee: The Procter & Gamble Company
    Inventors: Robert S. Dirksing, Bruce Brown, Ray D. Lotts, Louis F. Wong
  • Patent number: 4477363
    Abstract: A solid cake comprising 1% to 15% free fatty alcohol and 20% to 90% buffered alkali earth metal alkyl sulfate surfactant. Perfume, dye or salt, or any combination thereof are added. The surfactant and cakes made therefrom have pH's of from about 6 to about 10. The free fatty alcohol and buffered surfactant compositions and their cakes have improved longevity and improved stability. Preferred cakes are made with coconut free fatty alcohol and buffered magnesium alkyl sulfate.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: October 16, 1984
    Assignee: The Procter & Gamble Company
    Inventors: Louis F. Wong, Rosstain F. Sterling, Thomas A. Borcher, Sr.
  • Patent number: 4476046
    Abstract: A solid cake comprising 20% to 90% buffered alkali earth metal alkyl sulfate surfactant. Perfume, dye or salt, or any combination thereof are added. The surfactant and cakes made therefrom have pH's of from about 6 to about 10. The buffered surfactants and their cakes have improved stability and improved longevity. Preferred cakes are made with buffered magnesium alkyl sulfate.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: October 9, 1984
    Assignee: The Procter & Gamble Company
    Inventors: Louis F. Wong, Rosstain F. Sterling, Thomas A. Borcher, Sr.
  • Patent number: 4420412
    Abstract: A method of bleaching of certain triarylmethane dyes in aqueous systems with low concentration of hypochlorite ion, activated by the presence of bromide ion and ammonium ions. The method is particularly useful in providing a disappearing color signal in the automatic cleaning and sanitizing of toilet bowls with low concentrations of hypochlorite. Compositions and articles for implementing the practice of the method in the automatic cleaning and sanitizing of toilet bowls are also disclosed.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: December 13, 1983
    Assignee: The Procter & Gamble Company
    Inventor: Louis F. Wong
  • Patent number: 4384869
    Abstract: A method of bleaching of certain triarylmethane dyes in aqueous systems with low concentration of hypochlorite ion, activated by the presence of bromide ion and ammonium ions. The method is particularly useful in providing a disappearing color signal in the automatic cleaning and sanitizing of toilet bowls with low concentrations of hypochlorite. Compositions and articles for implementing the practice of the method in the automatic cleaning and sanitizing of toilet bowls are also disclosed.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: May 24, 1983
    Assignee: The Procter & Gamble Company
    Inventor: Louis F. Wong
  • Patent number: 4353866
    Abstract: A method of bleaching of certain triarylmethane dyes in aqueous systems with low concentration of hypochlorite ion, activated by the presence of bromide ion and ammonium ions. The method is particularly useful in providing a disappearing color signal in the automatic cleaning and sanitizing of toilet bowls with low concentrations of hypochlorite. Compositions and articles for implementing the practice of the method in the automatic cleaning and sanitizing of toilet bowls are also disclosed.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: October 12, 1982
    Assignee: The Procter & Gamble Company
    Inventor: Louis F. Wong