Patents by Inventor Richard David Koehler

Richard David Koehler 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).

  • Reduction of surface tension
    Patent number: 6506806
    Abstract: A composition for reducing surface tension comprising from about 0.1% to about 0.5% by weight of a hydrocarbon surfactant and from 0.0001% to about 0.3% by weight of a fluorocarbon surfactant, provided that the hydrocarbon surfactant is present at less than or equal to 0.08% by weight when the fluorocarbon surfactant is present at greater than or equal to 0.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Charles Kenneth Taylor, Kai Volker Schubert, Richard David Koehler
  • Reduction of surface tension
    Publication number: 20020014611
    Abstract: A composition for reducing surface tension comprising from about 0.1% to about 0.5% by weight of a hydrocarbon surfactant and from 0.0001% to about 0.3% by weight of a fluorocarbon surfactant, provided that the hydrocarbon surfactant is present at less than or equal to 0.08% by weight when the fluorocarbon surfactant is present at greater than or equal to 0.
    Type: Application
    Filed: May 15, 2001
    Publication date: February 7, 2002
    Inventors: Charles Kenneth Taylor, Kai Volker Schubert, Richard David Koehler