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| Number | Title | Issue Date |
| 5343292 | Method and apparatus for alignment of submicron lithographic features In the manufacture of microelectronic and optoelectronic circuitry, an arrangement for aligning submicrometer lithographic features on a wafer illuminating a diffraction grating on the wafer with an interferometrically established radiation intensity patt... | 08/30/1994 |
| 5275686 | Radial epitaxial reactor for multiple wafer growth An improved gas distribution scheme for a multi-wafer radially injected convergent horizontal epitaxial reactor which includes two outer distribution rings, an outer injection ring, an annular susceptor, and a central exhaust tube. The converging path of ... | 01/04/1994 |
| 5239407 | Method and apparatus for creating large second-order nonlinearities in fused silica A large second-order nonlinearity (.chi..sup.(2) ~1 pm/V~0.2 .chi..sup.(2)22 of LiNbO3) is induced in the near surface (~4 μm) region of commercial fused silica optical flats by a temperature (250°-325° C.) and electric field ... | 08/24/1993 |
| 5083097 | Adaptive control system for pulsed megawatt klystrons The invention provides an arrangement for reducing waveform errors such as errors in phase or amplitude in output pulses produced by pulsed power output devices such as klystrons by generating an error voltage representing the extent of error still presen... | 01/21/1992 |
| 5056602 | Copper powder fire extinguishant An arrangement is provided for extinguishing burning metal or metal-involved fires by combining an extinguishant with the burning metal to form a resultant material. The resultant material may include an alloy and oxides of the burning material and the ex... | 10/15/1991 |
| 5052016 | Resonant-periodic-gain distributed-feedback surface-emitting semiconductor laser A resonant-periodic-gain distributed-feedback surface-emitting semiconductor laser has a resonator with an axis perpendicular to the plane of the substrate. The resonator comprises a stack of distributed feedback elements, each consisting of a spacer regi... | 09/24/1991 |
| 5038532 | Deployable spatial structure The present invention relates to a deployable, continuously extendible and collapsible, closed or open ended, free standing or supported spatial structure comprising an array of spaced apart adjacent layers or tiers of pivotally connected criss-crossed ba... | 08/13/1991 |
| 5028352 | Low density/low surface area silica-alumina composition A silica-alumina composition characterized by having an essentially closed pore surface as measurable by low surface area consisting essentially of a range of alumina by weight therein of from about 40% to about 50% and the remainder by weight, silica, th... | 07/02/1991 |
| 4992778 | Pre-failure tension warning device The invention provides a method and means for detecting and giving warning of a predetermined status of cordage through the change of a warning element from one condition to a different condition in response to a change in the status of the cordage.... | 02/12/1991 |
| 4986271 | Vivo refillable glucose sensor An arrangement for prolonging the useful life of an electrochemical refillable implantable glucose sensor employing an enzyme material such as glucose oxidase immobilized on bulk particulate matter suspended in a fluid for reaction with components of bodi... | 01/22/1991 |
| 4987461 | High position resolution sensor with rectifying contacts The invention provides a position sensor for detecting relative displacement between two elements, and includes an optical beam-producing source fixed to one of the elements, a semiconductor body fixed to a second element and arranged so that the beams im... | 01/22/1991 |
| 4881236 | Wavelength-resonant surface-emitting semiconductor laser A wavelength resonant semiconductor gain medium is disclosed. The essential feature of this medium is a multiplicity of quantum-well gain regions separated by semiconductor spacer regions of higher bandgap. Each period of this medium consisting of one qua... | 11/14/1989 |
| 4813424 | Long-life membrane electrode for non-ionic species An improved membrane electrode for measuring the concentration of a non-ionic species in an essentially aqueous medium comprising: an electrically conductive substrate; a first coating surrounding said substrate composed of a mixture of polymeric material, an ... | 03/21/1989 |
| 4814623 | Pulsed neutron detector A pulsed neutron detector and system for detecting low intensity fast neutron pulses has a body of beryllium adjacent a body of hydrogenous material the latter of which acts as a beta particle detector, scintillator, and moderator. The fast neutrons (defi... | 03/21/1989 |
| 4708060 | Semiconductor bridge (SCB) igniter In an explosive device comprising an explosive material which can be made to explode upon activation by activation means in contact therewith; electrical activation means adaptable for activating said explosive material such that it explodes; and electrical ci... | 11/24/1987 |
| 4673695 | Low density microcellular foams Low density, microporous polymer foams are provided by a process which comprises forming a solution of polymer and a suitable solvent followed by rapid cooling of the solution to form a phase-separated system and freeze the phase-separated system. The pha... | 06/16/1987 |
| 4666547 | Electrically conductive resinous bond and method of manufacture A method of bonding elements together with a bond of high strength and good electrical conductivity which comprises: applying an unfilled polyimide resin between surfaces of the elements to be bonded, heat treating said unfilled polyimide resin in stages ... | 05/19/1987 |
| 4657747 | Recovery of tritium from tritiated molecules A method of recovering tritium from tritiated compounds comprises the steps of heating tritiated water and other co-injected tritiated compounds in a preheater to temperatures of about 600° C. The mixture is injected into a reactor charged with a mixture... | 04/14/1987 |
| 4658208 | Downhole steam quality measurement An empirical method for the remote sensing of steam quality that can be easily adapted to downhole steam quality measurements by measuring the electrical properties of two-phase flow across electrode grids at low frequencies.... | 04/14/1987 |
| 4656430 | Short rise time intense electron beam generator A generator for producing an intense relativistic electron beam having a subnanosecond current rise time includes a conventional generator of intense relativistic electrons feeding into a short electrically conductive drift tube including a cavity contain... | 04/07/1987 |
| 4652710 | Mercury switch with non-wettable electrodes A mercury switch device comprising a pool of mercury and a plurality of electrical contacts made of or coated with a non-wettable material such as titanium diboride.... | 03/24/1987 |
| 4652467 | Inorganic-polymer-derived dielectric films A method of coating a substrate with a thin film of a polymer of predetermined porosity comprises depositing the thin film on the substrate from a non-gelled solution comprising at least one hydrolyzable metal alkoxide of a polymeric network forming catio... | 03/24/1987 |
| 4648936 | Dopant type and/or concentration selective dry photochemical etching of semiconductor materials A method of selectively photochemically dry etching a first semiconductor material of a given composition in the presence of a second semiconductor material which is of a composition different from said first material, said second material substantially n... | 03/10/1987 |
| 4648938 | Composition/bandgap selective dry photochemical etching of semiconductor materials A method of selectively photochemically dry etching a first semiconductor material of a given composition and direct bandgap Eg1 in the presence of a second semiconductor material of a different composition and direct bandgap Eg2, wh... | 03/10/1987 |
| 4641037 | Organic metal neutron detector A device for detecting neutrons comprises a layer of conductive polymer sandwiched between electrodes, which may be covered on each face with a neutron transmissive insulating material layer. Conventional electrodes are used for a non-imaging integrating ... | 02/03/1987 |
| 4641099 | Methods for enhancing mapping of thermal fronts in oil recovery A method for enhancing the resistivity contrasts of a thermal front in an oil recovery production field as measured by the CSAMT technique is disclosed. This method includes the steps of: (a) preparing a CSAMT-determined topological resistivity map of the ... | 02/03/1987 |
| 4633172 | In-line beam current monitor An intense relativistic electron beam current monitor for a gas neutralized beam transport line includes a first foil for conducting plasma current to the wall where it is measured as it traverses an inductive loop formed by a cavity in the wall. An insul... | 12/30/1986 |
| 4628267 | Measuring of electrical changes induced by in situ combustion through flow-through electrodes in a laboratory sample of core material Method and apparatus are provided for obtaining accurate dynamic measurements for passage of phase fronts through a core sample in a test fixture. Flow-through grid structures are provided for electrodes to permit data to be obtained before, during and af... | 12/09/1986 |
| 4626448 | Plasma deposition of amorphous metal alloys Amorphous metal alloy coatings are plasma-deposited by dissociation of vapors of organometallic compounds and metalloid hydrides in the presence of a reducing gas, using a glow discharge. Tetracarbonylnickel, phosphine, and hydrogen constitute a typical r... | 12/02/1986 |
| 4626708 | Electronic logic to enhance switch reliability in detecting openings and closures of redundant switches A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and failsafe representation of the switch outputs. When both switch o... | 12/02/1986 |
| 4624736 | Laser/plasma chemical processing of substrates A process for the modification of substrate surfaces is described, wherein etching or deposition at a surface occurs only in the presence of both reactive species and a directed beam of coherent light.... | 11/25/1986 |
| 4621577 | Miniature plasma accelerating detonator and method of detonating insensitive materials The invention is a detonator for use with high explosives. The detonator comprises a pair of parallel rail electrodes connected to a power supply. By shorting the electrodes at one end, a plasma is generated and accelerated toward the other end to impact ... | 11/11/1986 |
| 4622355 | Radiation-hardened polymeric films The radiation-induced conductivity of polymeric dielectrics with low electronic mobility is reduced by doping with electron donor or electron acceptor compounds at a level of 1015 to 1021 molecules of dopant/cm3. Polyester... | 11/11/1986 |
| 4622049 | Apparatus for adjusting and maintaining the humidity of gas at a constant value within a closed system The humidity of a gas within a closed system is maintained at constant level by providing a saturated salt solution within a lower chamber in communication with an upper chamber conjointly defined by upper and lower container sections in sealing contact w... | 11/11/1986 |
| 4620081 | Self-contained hot-hollow cathode gun source assembly A self-contained hot-hollow cathode gun source assembly for use in a vacuum chamber includes a crucible block having a hot-hollow cathode gun mounted underneath and providing a hole for the magnetic deflection of the ion/electron beam into a crucible on t... | 10/28/1986 |
| 4617044 | Method for forming glass-to-metal seals A method for forming a glass-to-metal seal in which the glass has a higher melting point than the metal. The molten glass is vacuum injection molded onto the metal, thus melting a very thin layer of the surface of the metal long enough to form a seal, but... | 10/14/1986 |
| 4617167 | Underwater radiation detector A detector apparatus for differentiating between gamma and neutron radiation is provided. The detector includes a pair of differentially shielded Geiger-Mueller tubes. The first tube is wrapped in silver foil and the second tube is wrapped in lead foil. B... | 10/14/1986 |
| 4616241 | Superlattice optical device A semiconductor optical device which includes a superlattice having direct transitions between conduction band and valence band states with the same wave vector, the superlattice being formed from a plurality of alternating layers of two or more different... | 10/07/1986 |
| 4616184 | CSAMT method for determining depth and shape of a sub-surface conductive object The depth to and size of an underground object may be determined by sweeping a CSAMT signal and locating a peak response when the receiver spans the edge of the object. The depth of the object is one quarter wavelength in the subsurface media of the frequ... | 10/07/1986 |
| 4612029 | Method and apparatus for performing in-situ vacuum-assisted metal to glass sealing A method and apparatus for assembling and fusing glass to metal in a glass-metal electrical component is disclosed. The component includes a metallic shell formed with upper and lower cylindrical recesses connected together by longitudinal passages, a pai... | 09/16/1986 |
