Patents by Inventor Edward F. Hagan

Edward F. Hagan 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).

  • Rotary developer and method for its use
    Patent number: 4799993
    Abstract: A rotary developer for removing unhardened portions of a layer of an electronic part to form vias in the part. The developer orbits the layer about the axis in one direction while rotating the layer in an opposite direction eliminating leading and trailing edge effects on vias.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edward F. Hagan
  • Apparatus for mounting flexible printing plates
    Patent number: 4446625
    Abstract: An apparatus for mounting flexible printing plates on printing cylinders. A frame is fixed with respect to a printing cylinder and a plate is fixed on the frame by keys. When an end of the plate has been adhered to the cylinder, the keys are detached and the rest of the plate is applied to the cylinder.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: May 8, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edward F. Hagan, Marvin G. Reaver, Jr.