Patents by Inventor Andrea J. Hausman Hazlitt

Andrea J. Hausman Hazlitt 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: 4996160
    Abstract: An apparatus and method are used for determining the cleanliness of an electronic circuit assembly (ECA) such as printed circuit boards (PCB) following noraml cleaning and flux removal processes. The apparatus and method are used to quantitatively measure the ionic and organic contaminants remaining on an ECA. The apparatus utilizes small volumes of isopropanol, a conductivity/resistivity probe and cell and a spectrophotometric analytical instrument. The apparatus generally provides for washing the "cleaned" of defluxed ECA with a measured volume of isopropanol and thereafter measuring the ionic and organic contaminants in the wash solution. The results can then be compared to a standard.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: February 26, 1991
    Assignee: The Dow Chemical Company
    Inventors: Andrea J. Hausman Hazlitt, Warren F. Richey