Patents by Inventor Phillip De Prado

Phillip De Prado 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).

  • Screen printing method for producing lines of uniform width and height
    Patent number: 4808435
    Abstract: An improved method for screen printing fine lines of conductive paste on a substrate wherein a mask having a desired pattern of line shaped openings is placed on the substrate, and conductive paste screened in the openings in the mask in contact with the substrate, and also as a thin layer over the top surface of the mask. The mask is removed from the substrate before the conductive paste in the openings dries, thereby leaving a fine pattern of paste lines with a uniform height on the substrate.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: February 28, 1989
    Assignee: International Business Machines Corporation
    Inventors: Michael E. Cropp, Phillip De Prado, Kamalesh S. Desai