Patents Represented by Attorney Charles T. Watts

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  • Semiconductor element embodying an optical coating to enhance thermal gradient zone melting processing thereof
    Patent number: 4135027
    Abstract: An optical coating is disposed on selected surface areas of a semiconductor element to enchance processing thereof by TGZM
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: January 16, 1979
    Assignee: General Electric Company
    Inventors: Thomas R. Anthony, Harvey E. Cline
  • Method for rapid removal of cores made of Y.sub.2 O.sub.3 from directionally solidified eutectic and superalloy materials
    Patent number: 4134777
    Abstract: Caustic solutions are employed in an autoclave process to rapidly remove the cores made of Y.sub.2 O.sub.3 from directionally solidified eutectic alloy and superalloy materials.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: January 16, 1979
    Assignee: General Electric Company
    Inventor: Marcus P. Borom
  • Electrode with a graded electrical resistance substrate
    Patent number: 4133738
    Abstract: An electrode is described which includes a current collector and a porous conducting substrate. The electric resistance of the conducting substrate is varied generally by a shaped structure resulting in low and high electrical resistance portions. The improved electrode increases the uniformity of electrodeposited zinc thereon.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: January 9, 1979
    Assignee: General Electric Company
    Inventor: Fritz G. Will
  • Fabrication of shell investment molds
    Patent number: 4131475
    Abstract: Investment casting molds embody an alumina-silica composition for at least the primary coatings which comprises a flour mixture consisting of at least two different sizes of fused alumina. The grain sizes range from approximately 240 mesh to approximately 400 mesh, U.S. Standard or Tyler screen series.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: December 26, 1978
    Assignee: General Electric Company
    Inventor: Paul S. Svec
  • Method for making cyclic carbonates and polymers therefrom
    Patent number: 4129574
    Abstract: A method is provided for making cyclic carbonates of 2,2-bis(4-hydroxyphenyl)-1,1-dichloroethylene, such as the cyclic trimer, by effecting the polymerization of the aforementioned bis(4-hydroxyphenyl)dichloroethylene to a linear polycarbonate, and then agitating a solution of the resulting polycarbonate in the presence of a tertiary organic amine. The cyclic carbonates made by the aforementioned process are useful as flame retardants in polycarbonates.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: December 12, 1978
    Assignee: General Electric Company
    Inventor: John E. Hallgren
  • Nb.sub.3 Ge superconductive films grown with air
    Patent number: 4129166
    Abstract: A superconductive film of Nb.sub.3 Ge is produced by providing within a vacuum chamber a heated substrate and sources of niobium and germanium, reducing the pressure within the chamber to a residual pressure no greater than about 10.sup.-5 mm Hg, introducing air into the resulting evacuated chamber in controlled amounts and vaporizing the niobium and germanium to deposit a film of Nb.sub.3 Ge on the heated substrate.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: December 12, 1978
    Assignee: General Electric Company
    Inventor: Raymond A. Sigsbee
  • Nb.sub.3 Ge superconductive films grown with nitrogen
    Patent number: 4129167
    Abstract: A superconductive film of Nb.sub.3 Ge is produced by providing within a vacuum chamber a heated substrate and sources of niobium and germanium, reducing the pressure within the chamber to a residual pressure no greater than about 10.sup.-5 mm Hg, introducing nitrogen into the resulting evacuated chamber in controlled amounts and vaporizing the niobium and germanium to deposit a film of Nb.sub.3 Ge on the heated substrate.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: December 12, 1978
    Assignee: General Electric Company
    Inventor: Raymond A. Sigsbee
  • Detection of subsurface air flow
    Patent number: 4129776
    Abstract: A method and apparatus are described for determining the occurrence or non-occurrence of subsurface air flow and, in the event of the occurrence of subsurface air flow, being able to determine its direction into or out of the earth. The determinations are accomplished by the use of a pair of alpha particle detectors, each of which is disposed in a protective enclosure to constitute a detector unit. A pair of such units is employed, the two units being buried in the earth spaced from each other and at different depths. Readings detecting alpha particle emission are taken on both units and compared.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: December 12, 1978
    Assignee: General Electric Company
    Inventor: Robert L. Fleischer
  • Inertia welding process for making an anode assembly
    Patent number: 4129241
    Abstract: A two step inertia welding process is employed to join the stem to the substrate of a disc thereby forming an anode assembly for a rotating X-ray anode tube. The abutting surfaces to be joined are rubbed together to heat the substrate to an elevated temperature, at which time the weld joint is formed by inertia welding.
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: December 12, 1978
    Assignee: General Electric Company
    Inventor: Thomas M. Devine, Jr.
  • Poly-phenylene oxide process employing aminophenol reactants
    Patent number: 4129555
    Abstract: Process of forming polyphenylene oxide under polymer forming reaction conditions which comprises contacting an aminophenol with another phenol in the presence of an effective oxidative coupling catalyst. The resulting polyphenylene oxide resins in combination with styrene resins provide thermoplastic compositions having improved impact strength properties.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: December 12, 1978
    Assignee: General Electric Company
    Inventor: Dwain M. White
  • Nb.sub.3 Ge superconductive films
    Patent number: 4128121
    Abstract: A superconductive film of Nb.sub.3 Ge is produced by providing within a vacuum chamber a heated substrate and sources of niobium and germanium, reducing the pressure within the chamber to a residual pressure no greater than about 10.sup.-5 mm Hg, introducing oxygen into the resulting evacuated chamber in controlled amounts and vaporizing the niobium and germanium to deposite a film of Nb.sub.3 Ge on the heated substrate.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: December 5, 1978
    Assignee: General Electric Company
    Inventor: Raymond A. Sigsbee
  • Composition for making an investment mold for casting and solidification of superalloys therein
    Patent number: 4128431
    Abstract: A composition for making shell investment molds for the casting and solidification of superalloys therein embodies preparing a primary slurry composition of a mixture of three different flour grain sizes of fused alumina and a silica binder. The flour grain sizes range from approximately 240 mesh to approximately 400 mesh, U.S. Standard or Tyler screen series.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: December 5, 1978
    Assignee: General Electric Company
    Inventor: Paul S. Svec
  • Method for making organic polycarboxylic acids
    Patent number: 4128574
    Abstract: A method is described for making organic polycarboxylic acids or anhydrides, such as aromatic ether bis(phthalic acid)s, based on a cyclic imide-cyclic anhydride exchange reaction at elevated temperatures in the presence of water. In addition to making organic polycarboxylic acid, organic imides are also generated.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: December 5, 1978
    Assignee: General Electric Company
    Inventors: Ronald L. Markezich, Tohru Takekoshi
  • Preparation of 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane
    Patent number: 4128731
    Abstract: The compound 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane can be prepared by effecting reaction between phenol and chloral in a solvent medium comprising aqueous sulfuric acid of a concentration of from 75 to 88%.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: December 5, 1978
    Assignee: General Electric Company
    Inventors: Howard J. Klopfer, John R. Campbell
  • Organopolysiloxane-polycarbonate copolymers
    Patent number: 4126740
    Abstract: Polymeric compositions containing organosiloxane units and carbonate units modified by the presence of halogenated organic radicals imparting improved flame retardancy, reduced smoke evolution, and non-drip characteristics are described. Such compositions can be heat-treated alone or in the presence of curing agents to form thermoset products.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: November 21, 1978
    Assignee: General Electric Company
    Inventors: Arnold Factor, Keith N. Sannes
  • Annealing type Ib or mixed type Ib-Ia natural diamond crystal
    Patent number: 4124690
    Abstract: Type Ib or mixed type Ib-Ia natural diamond crystal is annealed at an annealing temperature ranging from about 1500.degree. C to about 2200.degree. C under a pressure which prevents significant graphitization of the diamond during the annealing to convert at least 20% of the total amount of type Ib nitrogen present in the crystal to type Ia nitrogen.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: November 7, 1978
    Assignee: General Electric Company
    Inventors: Herbert M. Strong, Richard M. Chrenko, Roy E. Tuft
  • Hot pressing of silicon nitride using beryllium additive
    Patent number: 4124403
    Abstract: A dense polycrystalline silicon nitride body is produced by hot-pressing a particulate mixture of silicon nitride and a beryllium additive.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: November 7, 1978
    Assignee: General Electric Company
    Inventors: Charles D. Greskovich, Svante Prochazka, Chester R. O'Clair
  • Polycrystalline diamond body
    Patent number: 4124401
    Abstract: A mass of diamond crystals in contact with a mass of eutectiferous silicon-rich alloy are disposed in a container and placed within a pressure transmitting powder medium. Pressure is applied to the powder medium resulting in substantially isostatic pressure being applied to the container and its contents sufficient to dimensionally stabilize the container and its contents. The resulting shaped substantially isostatic system of powder-enveloped container is hot-pressed whereby fluid eutectiferous silicon-rich alloy is produced and infiltrated through the interstices between the diamond crystals producing, upon cooling, an adherently bonded integral body.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: November 7, 1978
    Assignee: General Electric Company
    Inventors: Minyoung Lee, Lawrence E. Szala, Robert C. DeVries
  • Hot pressing of silicon nitride using magnesium silicide
    Patent number: 4124402
    Abstract: A dense polycrystalline silicon nitride body is produced by hot-pressing a particulate mixture of silicon nitride and a magnesium silicide additive.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: November 7, 1978
    Assignee: General Electric Company
    Inventors: Charles D. Greskovich, Chester R. O'Clair
  • Method of producing silicon-iron sheet materal, and product
    Patent number: 4123299
    Abstract: The magnetic properties of silicon-iron are improved by adding tin, and by both adding tin and lowering the sulfur content the weld brittleness is reduced in addition to improving the magnetic properties.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: October 31, 1978
    Assignee: General Electric Company
    Inventors: Howard C. Fiedler, Joseph T. Cohen