Patents by Inventor Karen Elizabeth Ruehl

Karen Elizabeth Ruehl 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).

  • Preparation of non corrosive aluminum sulfate
    Publication number: 20040166051
    Abstract: The addition of an alkali to aluminum sulfate raises the pH, increases that cationic charge, improves performance as compared to aluminum sulfate alone and causes the aluminum sulfate to be non-corrosive to skin and metal. The addition of a minor quantity of phosphoric acid also provides added stability to the product.
    Type: Application
    Filed: March 2, 2004
    Publication date: August 26, 2004
    Inventors: Benjamin Shultes, Karen Elizabeth Ruehl
  • Mid-basicity aluminum compounds and methods of making
    Patent number: 6537464
    Abstract: A method of making poly aluminum chloride water treatment products comprising reacting an aluminum compound with a base at a temperature in the range of about 70 to 250° F., measuring the aluminum oxide content and adding water to the reaction product as needed to prepare a product having an aluminum oxide content of about 10 percent by weight of the solution.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: March 25, 2003
    Assignee: General Chemical Corporation
    Inventors: Benjamin Shultes, III, Karen Elizabeth Ruehl, Teresa Antoinette Kristoff, Nicole Marie Gasiorowski