Patents by Inventor Robert A. Ballas

Robert A. Ballas 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).

  • Method for detecting enzymatic activity using particle agglutination
    Patent number: 4812396
    Abstract: A method is disclosed for determining enzymatic activity in a liquid sample by particle agglutination or inhibition of particle agglutination.
    Type: Grant
    Filed: July 2, 1987
    Date of Patent: March 14, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Robert A. Ballas, William A. Frey
  • Method for detecting enzymatic activity using particle agglutination
    Patent number: 4812395
    Abstract: A method is disclosed for determining enzymatic activity in a liquid sample by particle agglutination or inhibition of particle agglutination.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: March 14, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Robert A. Ballas, William A. Frey