Patents by Inventor Mark H. Hahn

Mark H. Hahn 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 a coating material on a substrate
    Patent number: 5583285
    Abstract: A method for detecting the presence of a coating material, particularly an organic solderability preservative, such as imidazole, on a copper substrate includes placing a test droplet on the surface of the substrate, forming an image of the droplet and measuring the contact angle between the wall of the droplet and the surface of the substrate.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: December 10, 1996
    Assignee: Lucent Technologies Inc.
    Inventors: Mark H. Hahn, Mary L. Patterson