Patents Represented by Attorney George A. Kap

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  • Ceramic composites with ceramic fibers
    Patent number: 5407740
    Abstract: A preferred composite which is useful at temperatures in excess of about 0.degree. C. comprising a ceramic matrix and 40-60% on volume basis of coated and uncoated fibers embedded in the matrix generally parallel to each other and in a controlled arrangement; the matrix is selected from the group consisting essentially of silicon nitride, silicon carbide and zirconium titanate; the fibers are silicon carbides fibers 5-20 microns thick; the coating on the coated fibers is boron nitride 0.1-0.3 microns thick; cross-section of the composite contains about one half, on volume basis, of uncoated fibers in one band extending from one side edge of the cross-section to the opposite side edge; the composite having unexpectedly improved strength and/or toughness compared to a composite composed of only coated or only uncoated fibers.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: April 18, 1995
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Todd L. Jessen
  • Fluorinated resins with low dielectric constant
    Patent number: 5405677
    Abstract: A highly fluorinated benzene compound is reacted with acryloyl chloride to ield a fluorinated liquid product which is used to impregnate a reinforcing structure. Upon impregnation, the liquid material is polymerized at about 55.degree. C. to produce a reinforced polymeric structure, which can be a circuit board. The polymer has dielectric constant of about 2.1, which is very low compared to the polymers used presently.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: April 11, 1995
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James R. Griffith, Henry S. W. Hu
  • Nonlinear optical composites of metal cluster laden polymers
    Patent number: 5405906
    Abstract: Nonlinear optical composites with large third-order optical response compd of metal clusters uniformly dispersed in polymers are prepared by vapor deposition of a metal onto a cold support while simultaneously cocondensing a vapor of an organic material. Where the organic material is a monomer, it polymerizes either when it comes in contact of the metal and/or when the cold surface is warmed. The unpolymerized monomer is removed to yield a processable composite. When the organic material is a diluent, it deposits as a solid on the cold surface forming a dispersion of the solid metal clusters in the liquid diluent. A polymer solution is then mixed with the dispersion and the composite is formed after removal of the diluent and the solvent for the polymer.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: April 11, 1995
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Allan W. Olsen, Zakya H. Kafafi
  • Transducers with improved signal transfer
    Patent number: 5376859
    Abstract: A transducer includes a rigid resin in the form of a solid block; a pluray of spaced and parallel piezoelectric rods of equal length disposed in the rigid resin and extending at one end thereof beyond the rigid resin; a solid soft resin enveloping the rods; and electrically conducting cover plates disposed against extremities of the rods; the rigid resin block being composed of a plurality of stacked preforms having spaced and parallel upper grooves wherein the rods are disposed.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: December 27, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Chulho Kim, Manfred Kahn
  • Polymerizable lipids for preparing vesicles that controllably release an encapsulant
    Patent number: 5366881
    Abstract: The present invention provides novel polymerizable lipids and mixtures thof with non-polymerizable lipids and methods for the controlled release of encapsulated materials using stabilized or polymerized vesicles. Release is induced by pH, ions, temperature, light or other changes in the environment. Time release mechanisms are also employed. Applications of the present invention especially include encapsulation of enzymes and their subsequent sustained release for degradation of environmental pollutants, encapsulation of fluorescent markers for use in sensor systems, and encapsulation and release of fragrant molecules in detergents.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: November 22, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Alok Singh, Joel M. Schnur
  • Transducer structure
    Patent number: 5367500
    Abstract: A flexible three-layer transducer wherein the layers are vertically stacked nd are coextensive with each other, the middle layer having twice the thickness of any one of the outer layers, and electrodes between and on the outside surface of the layers for conveying signals from the layers, said layers are made from PVDF or flexible piezoceramic sheets.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: November 22, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kin W. Ng
  • Plasma treatment of glass surfaces to remove carbon
    Patent number: 5364434
    Abstract: Glass free of surface carbon deposits, such as carbon film and/or carbon occlusions, and a process for removing such carbon deposits from glass. The process is characterized by the application of a plasma to glass to remove the carbon deposits. The plasma used for this purpose contains active specie which reacts with the carbon deposits to form gaseous carbon products.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: November 15, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jasbinder S. Sanghera, Pablo C. Pureza, Ishwar D. Aggarwal
  • Method and system for electron beam lithography
    Patent number: 5336892
    Abstract: Improvement of resolution in terms of reducing minimum feature sizes and ximity effects on bulk substrates in high voltage electron beam lithography as applied to manufacture of electronic circuits from coated semiconductors involves the use of a dielectric layer interposed between an electrically semiconducting substrate and a resist layer. The dielectric layer functions to reduce the resist exposure resulting from the backscattered electrons coming from the substrate into the resist layer.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: August 9, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Elizabeth A. Dobisz, Christie R. K. Marrian, Martin C. Peckerar, Kee W. Rhee
  • Method of making a semiconductor device by forming a nanochannel mask
    Patent number: 5332681
    Abstract: The present invention provides a method for depositing a pattern of deposd material on or within a substrate, comprising the steps of: interposing a glass mask between a source and a substrate, the mask having channels therethrough which are arranged in a pattern and which have an average diameter of less than 1 micron; and depositing a material selected from the group of sources consisting of ions, electrons, photons, metals and semiconductor materials through the glass mask into or onto the substrate. The present invention also provides semiconductor devices made by this method.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: July 26, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ronald J. Tonucci, Brian L. Justus
  • Transducers and method for making same
    Patent number: 5325011
    Abstract: Elongated electrically nonconducting transducer preforms are made from a ff resin. The preforms have grooves in their upper and lower surfaces. Transducer elements may be formed from stacked preforms whereby grooves in their upper and lower surfaces form compartments between adjoining stacked preforms. PZT rods are disposed in the grooves disposed on the upper surface of each stacked preform, and a soft resin surrrounds the rods and fills the compartment. The method for making the transducer assembly includes the steps of loading by gravity the rods into the upper grooves of the preforms; stacking the loaded preforms so that upper grooves in the lower preform communicate with lower grooves in the upper preform, thus forming cavities; flowing a soft resin around the rods; and curing the soft resin.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: June 28, 1994
    Assignee: The United States of America as represented by the asecretary of the Navy
    Inventors: Manfred Kahn, Chulho Kim
  • Corrosion inhibition in high temperature environment
    Patent number: 5312585
    Abstract: This invention pertains to the use of tin oxide as a corrosion resistant erial for preventing or inhibiting high temperature corrosion by molten sulfate-vanadate deposits and gaseous sulfur trioxide formed in engines or other high temperature apparatus which burn materials containing sodium, sulfur, and vanadium.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: May 17, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Robert L. Jones
  • Surface epoxidation of elastomers
    Patent number: 5310819
    Abstract: Surface epoxidized elastomeric articles containing unsaturation are obtai by immersing the articles in an epoxidizing solution for a time sufficient to epoxidize at least some surface unsaturation in the articles.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: May 10, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Charles M. Roland, Irina Zemel, Chester F. Poranski, Jr.
  • Method of making a semiconductor device using a nanochannel glass matrix
    Patent number: 5306661
    Abstract: The present invention provides a method of forming a semiconductor device mprising the steps of:forming a glass block of an acid inert glass having acid etchable glass rods extending therethrough, the acid etchable glass rods having an average diameter of less than 1 micron;partially etching one end of the acid etchable rods surface of the glass block to form cavities in the glass block on one surface thereof having an average diameter of less than 1 micron;depositing material(s) in the cavities to form a semiconductor device.The present invention also provides a method for forming a semiconductor device in which the acid etchable glass rods are completely etched and the deposition material(s) is deposited to fill the nanochannels formed by the etching.The present invention also provides semiconductor devices made by these methods.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: April 26, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ronald J. Tonucci, Brian L. Justus
  • Low loss glass and optical fibers therefrom
    Patent number: 5305414
    Abstract: Optical fibers and glass composition comprising a mixture of barium oxide, gallium oxide, germanium oxide, and a modifying agent selected from lanthium oxide, indium oxide, and mixtures thereof; molar ratio of barium oxide to gallium oxide is from about 4:1 to about 1:1, preferably 2:1 to 1, and especially about 1:1; amount of germanium oxide is at least 40 mole percent, preferably 60 to 95 mole percent, and especially 65 to 90 mole percent; about 0.1 to about 5 mole percent, preferably 0.5 to 4, of gallium oxide is replaced with the modifying agent. The optical fibers made from the glass composition defined herein, with or without the modifying agent, have light transmission wavelength band of about 0.3 to 4 microns; lower optical loss than silica-based optical fibers, the minimum optical loss of the novel fibers having the potential of 0.05 dB/km at 2 microns.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: April 19, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Paige L. Higby, Ishwar D. Aggarwal, Edward J. Friebele
  • Method of forming waveguides with ion exchange of halogen ions
    Patent number: 5294240
    Abstract: This invention pertains to optical waveguides which includes waveguides of ll shapes and sizes, preforms, and optical fibers made from the preforms, and to a method for making waveguides devoid of a physical interface.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: March 15, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jasbinder S. Sanghera, Pablo C. Pureza, Ishwar D. Aggarwal
  • Fluorinated resins with low dielectric constant
    Patent number: 5292927
    Abstract: A highly fluorinated benzene compound is reacted with acryloyl chloride to ield a fluorinated liquid product which is used to impregnate a reinforcing structure. Upon impregnation, the liquid material is polymerized at about 55.degree.C. to produce a reinforced polymeric structure, which can be a circuit board. The polymer has dielectric constant of about 2.1, which is very low compared to the polymers used presently.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: March 8, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James R. Griffith, Henry S. W. Hu
  • Electrochemical process and product therefrom
    Patent number: 5269890
    Abstract: Removal of non-diamond carbon from a diamond substrate surface is accompled in an electrochemical apparatus comprising an electrolyte and spaced electrodes immersed in the electrolyte and having impressed voltage producing a sufficient electric field in the electrolyte to remove at least a portion of the non-diamond carbon. Removal of the non-diamond carbon is accomplished by disposing the substrate in the electrolyte without touching the electrodes for a time sufficient to dislodge at least a portion of the non-diamond carbon. The invention herein is also directed to diamond substrates having non-diamond carbon with a high resolution on its surface.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: December 14, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Michael J. Marchywka
  • Nanochannel glass matrix used in making mesoscopic structures
    Patent number: 5264722
    Abstract: The present invention provides a method of forming a semiconductor device mprising the steps of:forming a glass block of an acid inert glass having acid etchable glass rods extending therethrough, the acid etchable glass rods having an average diameter of less than 1 micron;partially etching one end of the acid etchable rods surface of the glass block to form cavities in the glass block on one surface thereof having an average diameter of less than 1 micron;depositing material(s) in the cavities to form a semiconductor device.The present invention also provides a method for forming a semiconductor device in which the acid etchable glass rods are completely etched and the deposition material(s) is deposited to fill the nanochannels formed by the etching.The present invention also provides semiconductor devices made by these methods.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: November 23, 1993
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Ronald J. Tonucci, Brian L. Justus
  • Polymers of bis (ethynylstyryl) benzene and related monomers
    Patent number: 5264511
    Abstract: Monomers, B-stage polymers, C-stage polymers, cured polymers and electricy conducting polymers of acetylene-terminated aromatic monomers containing three benzene rings separated by ethylene groups are disclosed. These new polymers can withstand aggressive environments and are particularly adapted for use in high temperature composites in addition to the utilization of their electrical conducting properties. Preparation of these materials is accomplished by melt polymerization and heat treatment at high temperatures.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: November 23, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Theordore R. Walton
  • Polymer from diimido-di-phthalonitrile
    Patent number: 5262514
    Abstract: Substituted and unsubstituted di-phthalonitrile monomers devoid of ether /or phenoxy groups are solid at room temperature and which monomers are defined by the following general formula: ##STR1## where R is an aromatic tetravalent radical, thermoplastic prepolymers and thermosetting polymers which polymers are solid at room temperature and have a defined glass transition temperature if said polymers are cured at a temperature below a critical temperature or are devoid of a glass transition temperature if said polymers are postcured at a temperature exceeding said critical temperature.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: November 16, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Teddy M. Keller