Patents Assigned to Alfred University
  • Patent number: 5304281
    Abstract: A process for preparing a film consisting of at least about 90 weight percent of cubic cadmium sulfide is disclosed.In one step of this process, a cadmium sulfide target with a density of at least about 3.8 grams per cubic centimeter is provided. In a separate step, there is provided a heated substrate which is at a temperature of from about 50 to about 300 degrees Centigrade. The heated substrate is disposed at a distance of from about 2 to about 10 centimeters from the target.Both the heated substrate and the target are subjected to a pressure of from about 10.sup.-4 to about 10.sup.-9 Torr. Thereafter, the cadmium sulfide target is contacted with a laser beam with a wavelength of from about 100 nanometers to about 30 microns, an energy of at least about 1.0 watt, and a beam width of less than about 5 millimeters.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: April 19, 1994
    Assignee: Alfred University
    Inventor: Xingwu Wang
  • Patent number: 5297438
    Abstract: An electrical circuit containing novel piezoresistive sensor is disclosed. The sensor is connected to a source of direct current, and a manometric pressure of at least about 15 p.s.i.g. is applied to the sensor.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: March 29, 1994
    Assignee: Alfred University
    Inventors: Aldo B. Alles, Walter A. Schulze
  • Patent number: 5270293
    Abstract: A process for preparing a superconducting, ceramic material with an increased critical current is described. In this process, the materials used to form the superconducting material are mixed with at least one inorganic salt, and the mixture containing the salt is then heat treated. The salt is then leached from the heat-treated mixture.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: December 14, 1993
    Assignee: Alfred University
    Inventors: Walter A. Schulze, Sudhakar Gopalakrishnan
  • Patent number: 5260105
    Abstract: An atmospheric process for the production of a coating or film for electrochemical cells is disclosed. In the first step of this process, an aerosol mist containing reactants necessary to form the desired coating or film is provided. Thereafter, the mist is subjected to radio-frequency radiation while in the plasma region. Thereafter, the vaporized mixture is then deposited onto a substrate.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: November 9, 1993
    Assignee: Alfred University
    Inventor: Xingwu Wang
  • Patent number: 5225126
    Abstract: An electrical circuit containing novel piezoresistive sensor is disclosed. The sensor is connected to a source of direct current, and a stress of at least about 15 p.s.i. is applied to the sensor.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: July 6, 1993
    Assignee: Alfred University
    Inventors: Aldo B. Alles, Walter A. Schulze
  • Patent number: 5215563
    Abstract: A process for preparing an improved durable glass composition is described. In the first step of the process, a glass batch containing from 40 to 80 mole percent of phosphorous and from 3 to 40 mole percent of iron is provided. In the second step of the process, the glass batch is melted under an enriched oxygen atmosphere.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: June 1, 1993
    Assignee: Alfred University
    Inventors: William C. LaCourse, Steve T. Lin, Thirukumar Vethanyagam
  • Patent number: 5213851
    Abstract: In accordance with this invention, there is provided an atmospheric process for the production of a ferritic coating or film. In the first step of this process, an aerosol mist containing reactants necessary to form the ferrite is provided. Thereafter, the mist is subjected to radio-frequency radiation while in the plasma region. Thereafter, the vaporized mixture is then deposited onto a substrate.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: May 25, 1993
    Assignee: Alfred University
    Inventors: Robert L. Snyder, John Simmins, Xingwu Wang
  • Patent number: 5192351
    Abstract: A substantially dehydroxylated glass is formed by impregnating a dry porous silica gel with a nitrogen-containing organic compound in an organic solvent capable of solubilizing that compound. The impregnated gel is then sintered in a non-oxidizing atmosphere to form a substantially dehydroxylated, fully-densified silica glass. The gel is typically formed by a sol-gel process. The nitrogen-containing organic compound can be guanidine compounds, urea, or mixtures thereof.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: March 9, 1993
    Assignee: Alfred University
    Inventors: Akshay Mathur, Lenwood D. Pye
  • Patent number: 5157831
    Abstract: A process for preparing an electrical connector from a glass plug, a rigid metal shell, and at least one pin conductor is disclosed.The glass plug is made by mixing glass powder with binder, forming a green body, debindering the green body, and heating the debindered green body.The metal shell and metal pin conductor(s) are first cleaned by heating them in a hydrogen-containing atmosphere, and thereafter forming an oxide coating on their surfaces.An assembly is then formed from the rigid metal shell, the glass plug, and the pin conductor(s). This assembly is then heat treated to form the electrical connector.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: October 27, 1992
    Assignees: Alfred University, Howard J. Greenwald
    Inventors: Xingwu Wang, Jun Lou
  • Patent number: 5157015
    Abstract: A process for coating a superconductive film onto a substrate is provided. In the first step of this process, a solution of the reagents required to produce the superconductive material is subjected to ultrasonic sound waves to create an aerosol. Thereafter, the aerosol is contacted with plasma while being subjected to substantially atmospheric pressure and a radio frequency alternating current in excess of 100 kilohertz; a vapor is produced in this step. The vapor so produced is passed through an orifice and allowed to deposit onto a substrate, which is in contact with a substrate holder which is electrically grounded.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: October 20, 1992
    Assignee: Alfred University
    Inventors: Robert L. Snyder, Xingwu Wang, Honghai Zhong
  • Patent number: 5120703
    Abstract: A process for coating a superconductive film onto a substrate is provided. In the first step of this process, a solution of the reagents required to produce the superconductive material is subjected to ultrasonic sound waves to create an aerosol. Thereafter, the aerosol contacted with plasma while being subjected to substantially atmospheric pressure and a radio frequency alternating current in excess of 100 kilohertz; a vapor is produced in this step. The vapor so produced is passed through an orifice and allowed to deposit onto a substrate.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: June 9, 1992
    Assignee: Alfred University
    Inventors: Robert L. Snyder, Xingwu Wang, Honghai Zhong
  • Patent number: 5102833
    Abstract: Alkali metal- and alkaline earth metal-oxide aluminosilicate amorphous glass articles can be strengthened by providing such glass with a cerium dioxide sensitizer and a nucleating agent, irradiating the article with electromagnetic radiation, heating the irradiated article to a temperature between about the annealing and softening points of the glass, and cooling the heated, irradiated glass article. The treated article has a thick lower layer of the amorphous glass, but a thin layer of this glass at the surface of the article has been converted to a crystalline state. In this surface layer, some of the cerium has been converted from a +3 to a +4 ionic state and some of the metal element in the nucleating agent has been changed to a metallic state. The adjacent location of the lower and surface layers creates large compressive stresses at the surface layer which imparts great strength to the glass article.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: April 7, 1992
    Assignee: Alfred University
    Inventors: Jeetendra Sehgal, Lenwood D. Pye
  • Patent number: 5100868
    Abstract: A two-step process for the preparation of a thallium-containing superconductive film is described.In the first step of this process, an aerosol mist containing reactants necessary to produce a calcium/barium/strontium/copper precursor material is provided. This mist is subjected to radio-frequency radiation while in the plasma region, and it thereafter is deposited onto an electrically grounded substrate.In the second step of the process, the coated substrate is contacted with thallium-containing vapor.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: March 31, 1992
    Assignees: Alfred University Inc., University of Colorado Foundation, Inc.
    Inventors: Robert L. Snyder, Allen M. Hermann, Xingwu Wang, Hongmin Duan, Jemmy Hao
  • Patent number: 5045510
    Abstract: A process for preparing a surface-darkened glass is disclosed. In the first step of this process, a specified silicate glass which contains a minor amount of antimony trioxide is provided. Thereafter, this glass is heated to a temperature of from about 350 to about 1,000 degrees Celsius while being contacted with hydrogen-containing gas. The presence of the antimony trioxide in the glass facilitates the darkening of its surface.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: September 3, 1991
    Assignee: Alfred University
    Inventors: Jeffrey T. Kohli, James E. Shelby
  • Patent number: 5015619
    Abstract: A superconductive mirror assembly whose reflectivity can be varied is disclosed. This assembly contains an optionally transparent substrate, a superconductive film formed on the substrate, means for measuring the temperature of the superconductive film, means for measuring the reflectivity of the superconductive film, and means for varying the reflectivity of the superconductive film.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: May 14, 1991
    Assignee: Alfred University
    Inventor: Xingwu Wang
  • Patent number: 5015622
    Abstract: A contactless, multi-dimensional small stepper motor with a maximum dimension of less than about 10 centimeters is described. The motor contains at least one magnetized article, at least one superconductive primary suspending element, and at least two primary conductive elements.Each of the primary conductive elements is separated from each adjacent primary conductive element by a distance of from about 0.01 to about 10 millimeters.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: May 14, 1991
    Assignee: Alfred University
    Inventors: Raymond C. Ward, Xingwu Wang, William B. Carlson, Walter A. Schulze, Jr.
  • Patent number: 4999321
    Abstract: A durable, optically isotropic glass composition which contains 50-75 percent of germania, 10-25 percent of alumina and/or gallia, and 10-25 percent of terbium oxide and/or dysprosium oxide and/or gadolinium oxide.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: March 12, 1991
    Assignee: Alfred University
    Inventor: Jeffrey T. Kohli
  • Patent number: 4981633
    Abstract: A process for preparing a positive temperature coefficient thermistor is disclosed. This thermistor is comprised of at least about 60 weight percent of undoped, crystalline, ferroelectric material, and it has a room-temperature resistivity of less than 5,000 ohm-centimeters, an undegraded resistivity of at least about 1,000,000 ohm-centimeters, a degraded resistivity of at least about 900,000 ohm-centimeters, a ratio between its undegraded resistivity and its room-temperature resistivity of at least about 1,000, and a ratio between its undegraded resistivity and its degraded resistivity not exceeding 2.0.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: January 1, 1991
    Assignee: Alfred University
    Inventors: Aldo B. Alles, Vasantha R. W. Amarakoon, Vernon L. Burdick
  • Patent number: 4971946
    Abstract: There is disxlosed a process for preparing a novel superconducting material. This material has the formula YBa.sub.2 Cu.sub.3 O.sub.7-x wherin x is equal to or less than 0.3, the material has a bulk density of from about 90 to about 96 percent, and the hardness of the material is in excess of 5.0 GigaPascals.In the first step of the process, there is provided a pure powder comprised of barium, yttrium, and copper in a mole ratio of 2/1/3. Such powder is comprised of less than 1.0 mole percent of impurity.In the second step of the process, the powder is compacted. Thereafter, the compacted powder is fired at a temperature of from about 1,000 to about 1,300 degrees Clesius for a period not exceeding 12 hours.In the third step of the process, the temperature of the fired powder is reduced at least 20 degrees Celsius to a first reduced temperature within the range of from about 960 to about 990 degrees Celsius, and the powder is than held within this reduced temperature range for at least 1 hour.
    Type: Grant
    Filed: June 9, 1988
    Date of Patent: November 20, 1990
    Assignee: Alfred University
    Inventors: Jenifer Taylor, Prinya Sainamthip, David F. Dockery
  • Patent number: 4970195
    Abstract: A process for preparing a glass-ceramic material with superconducting properties is disclosed.In the first step of this process, a powder batch comprised of a glass-former and of barium oxide, yttrium oxide, and copper oxide (or the precursors of one or more of these oxides) is provided. These oxides (or their precursors) are present in varying amounts for the Ba.sub.2 YCu.sub.3 O.sub.x composition.In the second step of the process, the powder batch is melted at a temperature of from about 1170 to 1300 degrees Celsius while under an oxygen-containing atmosphere.In the third step of the process, the molten batch is rapidly cooled, thereby forming glass.In the fourth step of the process, the glass is heat-treated at a temperature of from about 750 to about 950 degrees Celsius.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: November 13, 1990
    Assignee: Alfred University
    Inventors: Atit Bhargava, Arun K. Varshneya, Robert L. Snyder