Patents Represented by Attorney B. T. Hogan
  • Patent number: 4370501
    Abstract: A simplified process for converting bis-phenols to dianilines is disclosed. Selected catalytic complexes are used to cause a nucleophilic displacement reaction between a bis-phenol and a quinazoline to occur thereby yielding a bis-quinazoline that may be subsequently converted into a bis-quinazolinone and hydrolyzed to form the desired dianiline.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: January 25, 1983
    Assignee: Hughes Aircraft Company
    Inventor: Kreisler S. Y. Lau
  • Patent number: 4341873
    Abstract: Improved multicomponent fluorozirconate glasses, doped with chlorine, and a process for making them are disclosed that are continuously transmissive in the infrared spectrum.
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: July 27, 1982
    Assignee: Hughes Aircraft Company
    Inventors: Morton Robinson, Ricardo C. Pastor, Morris Braunstein
  • Patent number: 4276407
    Abstract: Improved diimide and polyimide oligomers containing phenylacetylene terminal groups have been produced which melt at low temperatures and are curable into useful laminating resins, molding compounds and matrix resins. These oligomers are analogous to diimides and polyimides made from conventional dianhydrides, such as benzophenonetetracarboxylic dianhydride or pyromellitic dianhydride.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: June 30, 1981
    Assignee: Hughes Aircraft Company
    Inventors: Norman Bilow, Abraham L. Landis
  • Patent number: 4251315
    Abstract: Disclosed is a method of producing metal halide and metal chalcogenide crystals for infrared window application which exhibits a high conversion ratio.
    Type: Grant
    Filed: November 19, 1976
    Date of Patent: February 17, 1981
    Assignee: Hughes Aircraft Company
    Inventor: Antonio C. Pastor
  • Patent number: 4233347
    Abstract: Chemically stable polymers in aqueous alkaline solutions are dissolved in a strongly polar solvent, thoroughly dispersed from this solvent into and throughout the interstices of porous inorganic fabrics and subsequently separated from said solvent by precipitation to provide a homogeneous reinforcement of the structural properties of said fabrics.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: November 11, 1980
    Assignee: Hughes Aircraft Company
    Inventors: Hong S. Lim, Howard H. Rogers, Scott A. Verzwyvelt
  • Patent number: 4198461
    Abstract: We have prepared a new class of polymeric fibers and masses which are produced by precipitation from solutions of the polymer. The fibers and fiber masses have novel and useful characteristics. A fiber mass of this invention is a coherent, three-dimensional network of interconnected crystalline polymeric fibers and fiber bundles randomly arrayed in all directions. The fibers are smaller in diameter than can be consistently produced by conventional fiber drawing and spinning techniques.The novel fiber masses are produced from solutions of fiber-forming linear organic polymers having regularly repeated chain structures. The polymers are precipitated from these solutions by simultaneously cooling and agitating the polymer solution at vibrations in the sonic frequency range. The fiber masses may then be removed from the solvent or, in the case of a polymerizable solvent, a composite may be formed.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: April 15, 1980
    Assignee: Hughes Aircraft Company
    Inventors: Leon B. Keller, Robert K. Jenkins
  • Patent number: 4190640
    Abstract: An improved process for generating nascent bromine through the pyrolytic dissociation of CBr.sub.4 is shown to be applicable to the growth of large single crystals of metal bromides from the melt.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: February 26, 1980
    Assignee: Hughes Aircraft Company
    Inventors: Ricardo C. Pastor, Antonio C. Pastor
  • Patent number: 4146774
    Abstract: An apparatus and method for epitaxial film formation is disclosed. Planar reactive evaporation techniques suitable for scaling are employed to produce high purity compound semiconducting films at relatively low temperatures.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: March 27, 1979
    Assignee: Hughes Aircraft Company
    Inventor: Lewis M. Fraas
  • Patent number: 4128312
    Abstract: Reflective mode dynamic scattering displays are disclosed which operate under dc excitation for extremely long hours with excellent contrast. These displays are the results of a combination of a high reflectivity cathode, obtained by the use of silver mirror electrodes, with a redox doped ester liquid crystal in an otherwise conventional liquid crystal cell arrangement.
    Type: Grant
    Filed: October 4, 1977
    Date of Patent: December 5, 1978
    Assignee: Hughes Aircraft Company
    Inventors: Hong S. Lim, Michael J. Little
  • Patent number: 4128589
    Abstract: A tetrafluoromethane (CF.sub.4) generator and process is disclosed that facilitates the relatively low temperature production of CF.sub.4 gas via controlled decomposition of polytetrafluoroethylene (Teflon) and tetrafluoroethylene (C.sub.2 F.sub.4). CF.sub.4 produced via this process proves to be an excellent OH.sup.- scavenger in the processing and growth of metal fluoride single crystals.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: December 5, 1978
    Assignee: Hughes Aircraft Company
    Inventors: Ricardo C. Pastor, Morton Robinson
  • Patent number: 4099971
    Abstract: Infrared (IR) holograms are fabricated from holograms recorded with visible light in photographic silver halide emulsions. The process facilitates image reconstruction at longer IR wavelength than presently considered possible with conventional IR holographic materials.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: July 11, 1978
    Assignee: Hughes Aircraft Company
    Inventor: Andrejs Graube
  • Patent number: 4100138
    Abstract: A new class of copolymers obtained via the copolymerization of diethynylbenzene with an ethynyl-substituted polyimide oligomer has been used to prepare composite materials exhibiting zero void content. The copolymers are thermosetting in character and are particularly useful for the fabrication of composite structures such as glass fiber reinforced laminates and molding compounds and graphite fiber reinforced laminates and molding compounds.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: July 11, 1978
    Assignee: Hughes Aircraft Company
    Inventors: Norman Bilow, Boyce G. Kimmel
  • Patent number: 4076574
    Abstract: Alkali metal halide crystals exhibiting substantially improved physical and optical transmission characteristics are grown from starting powders by a one step Reactive Atmospheric Processing (RAP) method.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: February 28, 1978
    Assignee: Hughes Aircraft Company
    Inventors: Ricardo C. Pastor, Antonio C. Pastor
  • Patent number: 4075111
    Abstract: Self-lubricating composites of high thermal stability, excellent frictional characteristics and wear resistance are formulated from molybdenum disulfide, tungsten disulfide, molybdenum diselenide and thermosetting acetylene-substituted polyimide oligomers.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: February 21, 1978
    Assignee: Hughes Aircraft Company
    Inventors: Norman Bilow, Michael N. Gardos
  • Patent number: 4066569
    Abstract: Metallocenes when mixed with conjugated cyano-organic compounds such as 7,7'8,8'-tetracyanoquinodimethane (TCNQ) and (2,4,7,-trinitro-9-fluorenylidene)-malononitrile (TFM) function as excellent dopants for liquid crystals.
    Type: Grant
    Filed: December 30, 1975
    Date of Patent: January 3, 1978
    Assignee: Hughes Aircraft Company
    Inventor: Hong Sup Lim
  • Patent number: 4063974
    Abstract: An apparatus and method for epitaxial film formation is disclosed. Planar reactive evaporation techniques suitable for scaling are employed to produce high purity compound semiconducting films at relatively low temperatures.
    Type: Grant
    Filed: November 14, 1975
    Date of Patent: December 20, 1977
    Assignee: Hughes Aircraft Company
    Inventor: Lewis M. Fraas
  • Patent number: 4030997
    Abstract: A method of aligning nematic liquid crystals with their directors in a tilted configuration is disclosed.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: June 21, 1977
    Assignee: Hughes Aircraft Company
    Inventors: Leroy J. Miller, Jan Grinberg
  • Patent number: 4028104
    Abstract: A process is disclosed whereby infrared holograms can be recorded in photographic silver halide emulsions as positive images. High resolution holograms have been produced with 1.06 .mu.m radiation in photographic plates by utilizing the Herschel reversal effect.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: June 7, 1977
    Assignee: Hughes Aircraft Company
    Inventor: Andrejs Graube
  • Patent number: 3979530
    Abstract: A new insulation system, useful for the fabrication of high voltage transformers, capacitors and power supply encapsulation and insulation for high voltage leads, has been developed which substantially eliminates corona and improves reliability of these devices.
    Type: Grant
    Filed: April 15, 1974
    Date of Patent: September 7, 1976
    Assignee: Hughes Aircraft Company
    Inventors: Alfred W. Schwider, John Burnham, Robert S. Buritz
  • Patent number: 3959442
    Abstract: Single crystals, useful as laser emission compounds, having the formula ARF.sub.4 wherein A is potassium, sodium, or lithium, and R is holmium, yttrium, erbium, or dysprosium are prepared by a direct congruent melt crystal growth process that yields crystals exhibiting substantially superior physical and chemical characteristics compared to those grown by conventional methods.
    Type: Grant
    Filed: March 7, 1974
    Date of Patent: May 25, 1976
    Assignee: Hughes Aircraft Company
    Inventors: Ricardo C. Pastor, Morton Robinson