Patents by Inventor Leonard Peter Frieder, III

Leonard Peter Frieder, III 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).

  • Visibly transparent dyes for through-transmission laser welding
    Patent number: 7276136
    Abstract: Selection criteria for dyes that predicts efficiency and performance for plastics welding. A first stage quantitative calculation screens dyes that possess an absorption band that can be matched to a laser that is suitable for plastic welding. It also identifies absorption troughs in the visible spectrum and establishes relationships between the relative optical densities of the absorption band and trough. A second stage quantitative calculation screens dyes for their contribution to the transparency of the substrate. By combining these two stages, the usefulness of a candidate dye can be quickly, easily and inexpensively determined.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: October 2, 2007
    Assignee: Gentex Corporation
    Inventors: Robert A. Sallavanti, Leonard Peter Frieder, III
  • Visibly transparent dyes for through-transmission laser welding
    Patent number: 6911262
    Abstract: Selection criteria for dyes that predicts efficiency and performance for plastics welding. A first stage quantitative calculation screens dyes that possess an absorption band that can be matched to a laser that is suitable for plastic welding. It also identifies absorption troughs in the visible spectrum and establishes relationships between the relative optical densities of the absorption band and trough. A second stage quantitative calculation screens dyes for their contribution to the transparency of the substrate. By combining these two stages, the usefulness of a candidate dye can be quickly, easily and inexpensively determined.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: June 28, 2005
    Assignee: Gentex Corporation
    Inventors: Robert A. Sallavanti, Leonard Peter Frieder, III
  • Visibly transparent dyes for through-transmission laser welding
    Patent number: 6656315
    Abstract: Selection criteria for dyes that predicts efficiency and performance for plastics welding. A first stage quantitative calculation screens dyes that possess an absorption band that can be matched to a laser that is suitable for plastic welding. It also identifies absorption troughs in the visible spectrum and establishes relationships between the relative optical densities of the absorption band and trough. A second stage quantitative calculation screens dyes for their contribution to the transparency of the substrate. By combining these two stages, the usefulness of a candidate dye can be quickly, easily and inexpensively determined.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: December 2, 2003
    Assignee: Gentex Corporation
    Inventors: Robert A. Sallavanti, Leonard Peter Frieder, III