Patents by Inventor Lester J. Hollihan

Lester J. Hollihan 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: 5574005
    Abstract: A process for preparing detergent agglomerates for a detergent composition is provided. The process comprises the steps of: (a) providing a non-linear viscoelastic surfactant paste including, by weight of the surfactant paste, from about 70% to 95% of a detersive surfactant and from about 5% to about 30% of water; (b) regulating the amount of sodium carbonate in the surfactant paste such that the surfactant paste has a Maximum Shear Rate of at least 20 sec.sup.-1 so that the surfactant paste is processable; (c) charging the surfactant paste into a high speed mixer/densifier; (d) inputting from about 1% to about 70% by weight of a detergency builder into the high speed mixer/densifier; and (e) agglomerating the surfactant paste and the builder by treating the surfactant paste and the builder initially in the high speed mixer/densifier and subsequently in a moderate speed mixer/densifier so as to form detergent agglomerates.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: November 12, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Robert G. Welch, David N. Githuku, Lester J. Hollihan, Charles A. Jackson
  • Patent number: 5152932
    Abstract: A process for making high active detergent particles by: (a) reacting in a continuous neutralization system alkyl sulfuric acid and /or alkyl benzene sulfonic acid with concentrated sodium hydroxide solution, (b) adding to the system polyethylene glycol of molecular weight about 4,000-50,000 and/or certain ethoxylated nonionic surfactants, and (c) forming detergent particles. Granular detergent compositions containing the detergent granules are also described.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: October 6, 1992
    Assignee: The Procter & Gamble Company
    Inventors: Frank J. Mueller, Lester J. Hollihan