Patents Assigned to Particle Technology, Inc.
  • Process for making barium containing silicate glass powders
    Patent number: 6000241
    Abstract: A precursor solution composition is provided for making highly pure, fine barium-containing silicate glass powders and specifically barium aluminoborosilicate (BABS) glass powders. An atomized precursor solution containing colloidal silica, a water soluble source of barium, boric acid, and aluminum nitrate is used to make the powders. After mixing, the liquid precursor solution is formed into fine droplets, classified for size, and pyrolyzed into fine powders. The resulting spherical particles of the BABS glass is in the 0.1 to 10 micrometer size range.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: December 14, 1999
    Assignee: Particle Technology, Inc.
    Inventors: Madhav B. Ranade, Rohitha K. Wijayatilleke, M. Kamal Akhtar, Geoffrey J. Varga
  • Method of making metallic powders by aerosol thermolysis
    Patent number: 5928405
    Abstract: An economical process and associated hardware for commercial manufacture of controllable submicrometer size metallic powders for electronic and other applications. The method is based on the preparation of a stable high concentration precursor solution, production of a high density aerosol mist of the precursor solutions, selection of mist droplets with upper and lower size bounds, controlled drying of the droplets, their conversion to metallic powder in a high temperature gaseous atmosphere and the separation of the powders from carrier gases without significant loss inside the process hardware.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: July 27, 1999
    Assignees: Degussa Corporation, Particle Technology, Inc.
    Inventors: Madhav B. Ranade, Dan V. Goia, Geoffrey J. Varga, Bernard W. Gamson, John Bara
  • Liquid sampling and container handling apparatus
    Patent number: 3955436
    Abstract: Liquid sampling apparatus including a sampling head incorporating a floating pressure seal effected by a positive pressure introduced into an open top sample container in which the sampling head is telescopically introduced. The liquid sampling apparatus includes a compartment having at least an entrance, a cover slidable within said compartment and the sliding cover carrying the sampling head. The sliding cover has a depending shield capable of closing off the entrance to the compartment when the assembly head is therein introduced.The floating pressure seal is defined by a mounting ring seated in a suitable passageway formed in the cover. The mounting ring has a central aperture and a plunger is slidable within said aperture, one end of the plunger being threaded and having an adjusting ring threadably engaged thereupon for limiting the extent of free movement of the plunger relative to the mounting ring. The other end of the plunger has an enlarged head or piston.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: May 11, 1976
    Assignee: Particle Technology, Inc.
    Inventors: Howard E. Tucker, James A. Corll, Walter R. Hogg