Patents by Inventor Lawrence R. Holland

Lawrence R. Holland 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).

  • Solids refining apparatus
    Patent number: 4720373
    Abstract: A process and an apparatus provide a purified material by employing a rate of condensation of the material which is substantially greater than the rate of solidification of the material. Telleurium and cadmium are effectively purified by the process.
    Type: Grant
    Filed: January 16, 1986
    Date of Patent: January 19, 1988
    Assignee: Research Corporation
    Inventor: Lawrence R. Holland
  • High-temperature, high-pressure optical cell
    Patent number: 4614428
    Abstract: The invention is an optical cell for containment of chemicals under conditions of high temperature and high pressure and a method of making the optical cell. As shown in FIG. 1, the cell (10) is formed of a vitreous silica tube (14), two optical windows (16) comprising vitreous silica rod inserted into the ends of tube (14) and fused into position in the tube ends. Windows (16) are spaced apart to form a cavity (18) enclosed by the tube (14) and the windows (16). A hole (20) is drilled radially through the tube (14) and into the cavity (18). Another vitreous silica tube is fused to silica tube (14) around the hole (20) to form stem (22), which is perpendicular to the long axis of tube (14). The open end of stem (22) is used to load chemicals (12) into cavity (18). Then stem (22) may be sealed and, if desired, it may be shortened in order to reduce the volume of cavity (18), which extends into stem (22).
    Type: Grant
    Filed: January 17, 1984
    Date of Patent: September 30, 1986
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Ronald P. Harris, Lawrence R. Holland, Robbie E. Smith
  • Solids refining process
    Patent number: 4584054
    Abstract: A process and an apparatus provide a purified material by employing a rate of condensation of the material which is substantially greater than the rate of solidification of the material. Tellurium and cadmium are effectively purified by the process.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: April 22, 1986
    Assignee: Research Corporation
    Inventor: Lawrence R. Holland
  • Apparatus and method for heating a material in a transparent ampoule
    Patent number: 4408658
    Abstract: An improved process for heating a material (20) within a fused silica ampoule by radiation through the wall of the ampoule (16), while simultaneously passing a cooling gas (22) around the ampoule, the radiation having passed through a screen (18) of fused silica so as to remove those components capable of directly heating the silica, thereby increasing the temperature of the material within the ampoule above the strain point of the ampoule, while maintaining the exterior of the ampoule cool enough to prevent rupturing the amp
    Type: Grant
    Filed: June 30, 1981
    Date of Patent: October 11, 1983
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Lawrence R. Holland