Patents by Inventor Douglas E. Johnson

Douglas E. Johnson 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).

  • Patent number: 5437660
    Abstract: A method for removing unwanted material in a body lumen, cavity or organ provides the steps of using an endoscope or other viewing system to position a suitably sized lateral-lasing fiber optic device axially at one or more places in a body lumen, cavity or organ and delivering a predetermined amount of light energy for a predetermined period of time laterally in one or more directions, while delivering a biocompatible fluid at a predetermined rate of flow. The distal end of the lateral-lasing fiber optic device includes a reflectively-coated metal tip, which is capable of directing, by reflection, the light energy from the optical fiber laterally from the longitudinal axis of the light energy carrying optical fiber and outwardly toward a target tissue region.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: August 1, 1995
    Assignee: Trimedyne, Inc.
    Inventors: Douglas E. Johnson, Hany M. G. Hussein, Marvin P. Loeb
  • Patent number: 5200101
    Abstract: Arylamine/hindered phenol, acid anhydride and thioester-derived reaction products, have been found to be effective multifunctional antioxidant, antiwear and rust inhibiting additives for lubricants and fuels.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: April 6, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Shin-Ying Hsu, Andrew G. Horodysky, Douglas E. Johnson, David A. Blain
  • Patent number: 5135670
    Abstract: Reaction products of sulfur, olefins and sodium sulfide hydrates are improved extreme-pressure/antiwear additives for lubricants and liquid hydrocarbyl fuels.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: August 4, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Douglas E. Johnson, Andrew G. Horodysky, William F. Olszewski
  • Patent number: 4529958
    Abstract: The electrical resistor of the present invention comprises a flat metal plate having a thickness from 1 mil to 50 mils. A pair of electrical leads are operatively attached to the ends of the metal plate, and the side edges of the metal plate are provided with a plurality of notches extending inwardly in spaced apart relation to one another, with slots of one of the sides of the plate being staggered with respect to the slots of the other side of the plate. Each of the slots extend completely through the thickness of the plate and are formed by a laser beam cut which anneals the metal of the plate and imparts stability to the electrical characteristics of the metal plate. Once formed, the metal plate may be bent into different shapes to achieve the desired geometric configuration. Furthermore, the plate can be embedded in molded material so as to provide a protective covering for the plate.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: July 16, 1985
    Assignee: Dale Electronics, Inc.
    Inventors: Herman R. Person, Douglas E. Johnson
  • Patent number: 4467311
    Abstract: The electrical resistor of the present invention comprises a flat metal plate having a thickness from 8 mils to 50 mils. A pair of electrical leads are operatively attached to the ends of the metal plate, and the side edges of the metal plate are provided with a plurality of notches extending inwardly in spaced apart relation to one another, with slots of one of the sides of the plate being staggered with respect to the slots of the other side of the plate. Each of the slots extend completely through the thickness of the plate and are formed by a laser beam cut which anneals the metal of the plate and imparts stability to the electrical characteristics of the metal plate. Once formed, the metal plate may be bent into different shapes to achieve the desired geometric configuration. Furthermore, the plate can be imbedded in molded material so as to provide a protective covering for the plate.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: August 21, 1984
    Assignee: Dale Electronics, Inc.
    Inventors: Herman R. Person, Douglas E. Johnson
  • Patent number: 4338978
    Abstract: A seawater activated battery plate, and a method of making the same, utilizing an electrically conducting grid and an active reducible material primarily constituting lead chloride adhering to the grid such that the grid is exposed at a surface of the active material, the material adjacent the grid primarily constituting porous lead and a metal chloride. The battery plate is characterized by its inexpensive method of manufacture, its quick activation even in cold seawater, its absence of significant voltage peaking at initial discharge and uniform voltage generation during discharge.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: July 13, 1982
    Assignee: Sparton Corporation
    Inventors: John L. Devitt, Douglas E. Johnson, Robert S. Willard