Patents by Inventor Nelson Eduardo Prieto

Nelson Eduardo 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).

  • Corrosion inhibiting antifreeze compositions containing various carboxylic acids
    Patent number: 5997763
    Abstract: An anti-freeze concentrate made by adding together at least:a) an alkylene glycol;b) an effective corrosion inhibiting amount, or more, of an unsubstituted benzoic acid; andc) an effective corrosion inhibiting amount, or more, of a C.sub.7 -C.sub.14 monocarboxylic acid.This formulation is particularly effective at inhibiting corrosion in coolants which are free of borates, primary and secondary amines, phosphates, silicates, as well as those coolants which are free of p-tertbutyl benzoic acid.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: December 7, 1999
    Assignee: Shell Oil Company
    Inventors: Raul Antonio Pabon, Jr., Nelson Eduardo Prieto
  • Secondary alkyl sulfate-containing hard surface cleaning compositions
    Patent number: H1680
    Abstract: The present invention relates to a hard surface cleaning composition comprising from about 0.1 percent by weight to about 50 percent by weight, basis the total weight of the composition, of one or more secondary alkyl sulfate compounds.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: September 2, 1997
    Assignee: Shell Oil Company
    Inventor: Nelson Eduardo Prieto