Patents by Inventor Harold J. Noble, Jr.

Harold J. Noble, Jr. 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).

  • Determination of surfactant concentration in an aqueous fluid
    Patent number: 5710048
    Abstract: A single-phase method for quantitatively measuring the anionic surfactant content of an aqueous machining fluid is provided. The method is carried out at a pH value of from about 1.5 to about 3.0 and from about 9.5 to about 10.6 and involves the addition of an excess of a standardized aqueous solution of 1,3-didecyl-2-methylimidazolium chloride to the sample of aqueous machining fluid and then back titrating the excess 1,3-didecyl-2-methylimidazolium chloride with a standardized aqueous solution of polyvinylsulfuric acid potassium salt in the presence of toluidine blue indicator. Values of the amount of 1,3-didecyl-2-methylimidazolium chloride amount corresponding to anionic surfactant concentration are produced by conducting the method using a series of standard aqueous solutions containing anionic surfactant at known concentrations.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: January 20, 1998
    Assignee: Cincinnati Milacron Inc.
    Inventors: Joseph M. Ernst, Harold J. Noble, Jr.