Patents by Inventor Scott J. Grack

Scott J. Grack 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: 5139957
    Abstract: The present invention provides a chemical indicator for the detection of hydrogen peroxide. A composition containing an aqueous solution of potassium dichromate is applied to a porous substrate. The reaction between the dichromate and chromate ions present in solution and hydrogen peroxide is accompanied by a dramatic color change which is visible to the naked eye. The initial color of the potassium dichromate solution may be enhanced by adjusting the pH of the solution to be basic. The rate of reaction between the dichromate and chromate ions and the hydrogen peroxide may be increased by the addition of the humectant urea to the potassium dichromate solution.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: August 18, 1992
    Assignee: American Sterilizer Company
    Inventor: Scott J. Grack