Patents by Inventor Timothy E. Groff

Timothy E. Groff 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).

  • Photoconductor drum, having a non-conductive layer, with an area of electrical contact and method of manufacturing the same
    Patent number: 5324608
    Abstract: Forming an area of good electrical contact on a photoconductor drum, having a non-conductive layer, by means of a laser beam leads to a reduction in the loss rate in the manufacturing process. The area of electrical contact is introduced without the use of caustic or corrosive chemicals and without the production of waste products, such as metal powder or spend chemicals. The drums produced by the process are free of scratches which arise from other methods, free of chemical residues in the area of electrical contact, and have an area of electrical contact which is even and smooth.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: June 28, 1994
    Assignee: Mitsubishi Kasei America, Inc.
    Inventors: Frederick W. Gerriets, John E. LaRegina, Timothy E. Groff