Patents by Inventor Nelson E. Prieto

Nelson E. Prieto 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).

  • Aqueous cleaning
    Patent number: 6511546
    Abstract: A process for the use of an aqueous cleaning composition to remove organic material from a substrate. The cleaning composition preferably includes a nonionic surfactant and may also include a glycol ether solvent.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: January 28, 2003
    Assignee: Petroferm Inc.
    Inventors: Elizabeth A. Bivins, Nelson E. Prieto, Michael E. Hayes, Byron A. Starkweather
  • Secondary alkyl sulfate-containing powdered laundry detergent compositions
    Patent number: 5389277
    Abstract: The present invention relates to a powdered detergent composition comprising from about 2 percent by weight to about 30 percent by weight, basis the total weight of the composition, of one or more secondary alkyl sulfate compounds and from about 30 percent by weight to about 85 percent by weight, basis the total weight of the composition, of one or more builders, from about 0.1 percent by weight to about 48 percent by weight, basis the total weight of the composition, of one or more fillers, and from about 0 percent by weight to about 12 percent by weight, basis the total weight of the composition, of one or more bleach compounds.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: February 14, 1995
    Assignee: Shell Oil Company
    Inventor: Nelson E. Prieto
  • Cleaning composition and method of use
    Patent number: 5145597
    Abstract: A cleaning composition and a method of using such composition to remove polymeric deposits on mechanical equipment used in producing or processing polymeric materials, comprises an aqueous solution of from about 1% by weight to about 12% by weight of caustic, from about 0.05% by weight to about 3% by weight of a phosphate builder, from about 0.05% by weight to about 3% by weight of a chelating agent, from about 0.1% by weight to about 6% by weight of a solubilizer and from about 1% by weight to about 7% by weight of a nonionic surfactant.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: September 8, 1992
    Assignee: Shell Oil Company
    Inventors: Manual S. Rodriguez, Nelson E. Prieto
  • Detergent formulations containing a surface active composition containing a nonionic surfactant component and a secondary alkyl sulfate anionic surfactant component
    Patent number: H1467
    Abstract: This invention relates to detergent formulations containing a surface active composition comprising one or more nonionic surfactant components and one or more secondary alkyl sulfate anionic surfactant components.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: August 1, 1995
    Assignee: Shell Oil Company
    Inventors: Nelson E. Prieto, Kirk H. Raney, Werner Lilienthal
  • Secondary alkyl sulfate-containing liquid laundry detergent compositions
    Patent number: H1478
    Abstract: The present invention relates to a laundry liquid detergent composition comprising from about 1 percent by weight to about 18 percent by weight, basis the total weight of the composition, of one or more secondary alkyl sulfate compounds, from about 6 percent by weight to about 18 percent by weight, basis the total weight of the composition, of one or more additional or cosurfactant compounds, from about 0 percent by weight to about 20 percent by weight, basis the total weight of the composition, of one or more builders, and from about 35 percent by weight to about 78 percent by weight, basis the total weight of the composition, of one or more solvents.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: September 5, 1995
    Assignee: Shell Oil Company
    Inventor: Nelson E. Prieto
  • Secondary alkyl sulfate-containing light duty liquid detergent compositions
    Patent number: H1559
    Abstract: The present invention relates to light duty liquid detergent compositions containing one or more secondary alkyl sulfate surfactant components.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: July 2, 1996
    Assignee: Shell Oil Company
    Inventors: Nelson E. Prieto, JanElsa E. Carty, Ruth J. Blanco, William W. Schmidt