Patents by Inventor Thomas A. Wolfe

Thomas A. Wolfe 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: 7452483
    Abstract: A phosphor blend for an electroluminescent lamp is described that comprises a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 to 0.475 when stimulated by an electric field.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: November 18, 2008
    Assignee: Global Tungsten & Powders Corp.
    Inventors: Judy A. Belinski-Wolfe, Chung Nin Chau, Thomas A. Wolfe
  • Patent number: 7300492
    Abstract: A novel molybdenum compound, ammonium dodecamolybdomolybdate (AMM), is described which may be used in the manufacture of molybdenum metal and molybdenum carbide powders. The molybdenum compound is a dodecaheteropoly acid salt having a Keggin-type structure wherein molybdenum resides in both the hetero as well as peripheral atomic positions. The novel compound has the general formula (NH4)2Mo12MoO40·6H2O. Because of its low solubility, the compound can be crystallized efficiently and at a high purity from ammonium molybdate solutions.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: November 27, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Raj P. Singh, Thomas A. Wolfe, David L. Houck
  • Patent number: 7291291
    Abstract: There is presented an electroluminescent phosphor powder of copper-activated zinc sulfide particles that has a size distribution with a D50 value of less than 12 ?m, and more preferably less than 10 ?m. The powder is preferably made by a method that includes the steps of combining copper-doped zinc sulfide with sulfur, zinc oxide and a chloride-containing flux to form a first mixture; preliminarily firing the first mixture and milling the preliminarily fired first mixture to form a milled material having a D50 value of less than or equal to about 5 ?m; blending the milled material with sulfur, zinc oxide and a chloride-containing flux to form a second mixture; firing the mixture in a first firing step at a temperature in a range of about 1020° C. to about 1080° C. to form a hexagonal zinc sulfide material; inducing defects into the hexagonal zinc sulfide material; firing the hexagonal zinc sulfide material in a second firing step at a temperature in a range of about 650° C. to about 850° C.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: November 6, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Judy A. Belinski-Wolfe, Thomas A. Wolfe, Brian J. Payne
  • Patent number: 7059477
    Abstract: A tip jar having an open necked portion and a cylindrical body portion with an upper and a lower separable section for separating paper currency from coins. The upper separable section has a centered conical portion with its peripheral base attached to the wall of the upper separable section and has peripheral coin receiving apertures alternating with raised coin deflectors adjacent the wall. The lower separable section has a closed bottom. The lower section, the upper section, and the neck portion are connected together by threading regions. The outer surface of the necked portion has an insert window guide for insertion of an advertisement sheet including a centered oval thumb slide opening to facilitate the removal of the sheet. A plurality of light emitting diodes can be positioned proximate the bottom of the jar and energized by battery to attract attention.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: June 13, 2006
    Inventors: Thomas A. Wolf, II, Daniella M. Wolf
  • Patent number: 7041151
    Abstract: An electrochemical displacement-deposition method for making composite metal powders is described. The method is carried out by combining tungsten or molybdenum metal particles with particles of silver oxide or copper oxide in an aqueous hydroxide solution. Heat is applied to the solution to cause the oxide particles to convert to silver or copper metal particles which are substantially adhered to the refractory metal particles. Unlike conventional methods, it is not necessary to heat the oxide powders to a very high temperature in a reducing atmosphere in order to form the composite metal powder.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: May 9, 2006
    Assignee: Osram Sylvania Inc.
    Inventors: Raj Pal Singh Gaur, Scott A. Braymiller, Thomas A. Wolfe, Michael R. Pierce, David L. Houck
  • Patent number: 6793907
    Abstract: A novel molybdenum compound, ammonium dodecamolybdomolybdate (AMM), is described which may be used in the manufacture of molybdenum metal and molybdenum carbide powders. The molybdenum compound is a dodecaheteropoly acid salt having a Keggin-type structure wherein molybdenum resides in both the hetero as well as peripheral atomic positions. The novel compound has the general formula (NH4)2Mo12MoO40.6H2O. Because of its low solubility, the compound can be crystallized efficiently and at a high purity from ammonium molybdate solutions.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: September 21, 2004
    Assignee: Osram Sylvania Inc.
    Inventors: Raj P. Singh, Thomas A. Wolfe, David L. Houck
  • Publication number: 20040149085
    Abstract: An electrochemical displacement-deposition method for making composite metal powders is described. The method is carried out by combining tungsten or molybdenum metal particles with particles of silver oxide or copper oxide in an aqueous hydroxide solution. Heat is applied to the solution to cause the oxide particles to convert to silver or copper metal particles which are substantially adhered to the refractory metal particles. Unlike conventional methods, it is not necessary to heat the oxide powders to a very high temperature in a reducing atmosphere in order to form the composite metal powder.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 5, 2004
    Applicant: OSRAM SYLVANIA Inc.
    Inventors: Raj Pal Singh Gaur, Scott A. Braymiller, Thomas A. Wolfe, Michael R. Pierce, David L. Houck
  • Patent number: 6051196
    Abstract: A method for purifying a phosphorus containing scheelite ore is described wherein the calcite phase is selectively dissolved prior to dissolution of the apatite phase. Selective dissolution of the calcite produces several benefits: (1) a usable calcium solution, (2) enhanced apatite dissolution, and (3) lower volumes of toxic acid solution for disposal.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: April 18, 2000
    Assignee: Osram Sylvania Inc.
    Inventors: Raj P. Singh, Michael J. Miller, Thomas A. Wolfe
  • Patent number: 5819158
    Abstract: A simple, cost effective method for reclaiming tungsten values from tungsten-thoria has been invented. The method involves reacting the tungsten-thoria with molten sodium hydroxide to form a soluble sodium tungstate and an insoluble residue of thoria, cooling the melt, dissolving the melt in water, and filtering to separate the insoluble residue of thoria from the dissolved sodium tungstate. The method resulting in substantially all of the tungsten values being reclaimed as sodium tungstate and acutely reducing the amount of radioactive material for disposal.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: October 6, 1998
    Assignee: Osram Sylvania Inc.
    Inventors: Claraence D. Vanderpool, Thomas A. Wolfe, Michael J. Miller
  • Patent number: 5788938
    Abstract: A method is provided whereby tungsten values are recovered from ferrotungsten by completely oxidizing the ferrotungsten at high temperatures in an oxygen atmosphere followed by digestion with sodium hydroxide to form soluble sodium tungstate. The sodium tungstate is then purified by conventional means. The method may be used to recover at least about 90% of the tungsten values present in the ferrotungsten.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: August 4, 1998
    Assignee: Osram Sylvania Inc.
    Inventors: Jia-Ming Chern, Thomas A. Wolfe, Michael J. Miller, Clarence D. Vanderpool
  • Patent number: 5578285
    Abstract: A process for reducing the average particle size of an ammonium paratungstate powder having the steps of heating the ammonium paratungstate powder at a temperature of between about 110.degree. C. to about 205.degree. C. for a time sufficient to reduce the average particle size of the ammonium paratungstate powder by at least 20 percent.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: November 26, 1996
    Assignee: Osram Sylvania Inc.
    Inventor: Thomas A. Wolfe
  • Patent number: 5164171
    Abstract: In the manufacture of ammonium paratungstate, sulfide is added to a tungsten-containing solution in order to precipitate molybdenum sulfide. Volatiles, including sulfides, evolved during this process are collected in a caustic scrubbing solution. The sulfide values in the caustic scrubbing solution may be reused to precipitate molybdenum sulfide by first treating the caustic scrubbing solution with alkaline earth chloride or sulfate to precipitate out alkaline earth carbonate.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: November 17, 1992
    Assignee: GTE Products Corporation
    Inventors: Michael J. Miller, Martin C. Vogt, Thomas A. Wolfe
  • Patent number: 5154757
    Abstract: A method for producing pure cobalt metal powder involves the removal of divalent cationic impurities from a trivalent hexamine cobalt chloride solution. This solution is then decomposed to an insoluble cobalt oxide-containing material, from which pure cobalt metal powder is obtained through a chemical reduction process.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: October 13, 1992
    Assignee: GTE Products Corporation
    Inventors: Michael J. Miller, Thomas A. Wolfe, Michael J. Cheresnowsky, Tai K. Kim