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| Number | Title | Issue Date |
| 4871946 | Electrodeless high intensity discharge lamp An electrodeless high intensity arc discharge lamp employs an excitation coil comprised of a high-temperature metal, such as tungsten or molybdenum, wound directly on the hot quartz envelope of the arc tube within the interior of the outer glass envelope ... | 10/03/1989 |
| 4871969 | RF shield for RF coil contained within gradient coils of NMR imaging device An RF shield, for use between a set of gradient coils and an RF coil, is hollow formed of a single conductor sheet divided into first and second opposed halves, each having a set of conductive streamline portions with a series of nonconductive cut lines f... | 10/03/1989 |
| 4871617 | Ohmic contacts and interconnects to silicon and method of making same A conductive member consisting of a first conductor of an alloy of titanium and tungsten and a second conductor of a refractory metal such as molybdenum is sintered to a conductive member of silicon of low resistivity to form a low resistance contact ther... | 10/03/1989 |
| 4871903 | Apparatus for rapidly accessing a large data base employing an optical disc reading system with multiple heads and track position compensation means An OCR reads the name and address on sequentially conveyed mail. An index number is derived for each name and address for correlating that name and address to r-θ coordinates of file tracks on a CD-ROM disc which is rotated at constant velocity. The inde... | 10/03/1989 |
| 4871920 | High power wide band amplifier using optical techniques and impedance matching to source and load An amplifying apparatus has a plurality of series coupled laser diodes that impedance match a signal source impedance and which are optically coupled to at least one PIN diode that impedance matches a load impedance. A high DC voltage is applied to the PI... | 10/03/1989 |
| 4870279 | High resolution X-ray detector An imaging X-ray sensor is composed of a linear array of microscopically small bars of polycrystalline ceramic scintillator material bonded at the bar ends to an integrated circuit photodetector array. The scintillator bars are the basic resolution elemen... | 09/26/1989 |
| 4870377 | Electronic circuit substrate construction A microwave substrate is formed by thermocompression bonding a metalization system layer to two substrates having corresponding properties. One of the properties in one material is significantly different in value than that property in the other material.... | 09/26/1989 |
| 4869867 | Nuclear fuel A particulate mixture of uranium dioxide and additive of magnesium aluminosilicate composition is formed into a compact and sintered to produce a nuclear fuel wherein the uranium dioxide grains have an average grain size of at least about 20 microns and w... | 09/26/1989 |
| 4869866 | Nuclear fuel A mixture of uranium dioxide and additive of aluminosilicate composition is formed into a compact and sintered to produce a nuclear fuel wherein the uranium dioxide grains have an average grain size of at least about 20 microns and wherein substantially a... | 09/26/1989 |
| 4869868 | Nuclear fuel A particulate mixture of uranium dioxide and additive of magnesium silicate composition is formed into a compact and sintered to produce a nuclear fuel wherein the uranium dioxide grains have an average grain size of at least about 20 microns and wherein ... | 09/26/1989 |
| 4870293 | Extended-width CCD imager array capable of time-delay-integration operation A plurality of CCD imagers have their respective image registers arranged in side-by-side alignment respectively to receive contiguous portions of an image. The CCD imagers have respective field storage registers disposed on both sides of the arrayed imag... | 09/26/1989 |
| 4868921 | High voltage integrated circuit devices electrically isolated from an integrated circuit substrate An integrated circuit with a substrate of one conductivity type and a drift layer on the substrate of opposite conductivity type includes a high voltage semiconductor device, such as a P-N diode, with a first main device region of the opposite conductivit... | 09/19/1989 |
| 4868448 | Piezoelectric relay switching matrix A switching matrix includes at least one array of piezoelectric relays whose cantilevered drive elements are in the form of a unitary, comb-shaped structure of the piezoceramic mateial. Each drive element carries adjacent its free end at least one movable... | 09/19/1989 |
| 4868361 | Coupling device for high power laser beam transmitting optical fibers A fiber optic coupling device for coupling two optical fibers transmitting a high power laser beam is disclosed. In one embodiment, the device comprises a first lens to collimate the beam delivered by one of the optical fibers and a second lens to focus t... | 09/19/1989 |
| 4868279 | Spiro(bis) indane copolyamide and preparation thereof Copolyamides are prepared by the reaction of monocyclic spiro(bis)indane polyamide oligomers with lactams in the presence of basic reagents.... | 09/19/1989 |
| 4867812 | Fatigue crack resistant IN-100 type nickel base superalloys The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:... | 09/19/1989 |
| 4868903 | Safe logic zero and one supply for CMOS integrated circuits A circuit for supplying safe logic zero and logic one signals to hardwired inputs of CMOS ICs comprises, at most, three field effect transistors, none of which have gates connected to either drain voltage Vdd or source voltage Vss. T... | 09/19/1989 |
| 4866508 | Integrated circuit packaging configuration for rapid customized design and unique test capability The present invention employs a high density interconnect method to take advantage of a packaging arrangement in which full customization of an integrated circuit chip package is providable in a single metallization layer. The integrated circuit chips are... | 09/12/1989 |
| 4866497 | Infra-red charge-coupled device image sensor An infra-red charge-coupled device (IR-CCD) image sensor includes a substrate of single crystalline silicon having at one surface thereof a plurality of detectors arranged in space relation along a plurality of columns and a separate charge-coupled device... | 09/12/1989 |
| 4866130 | Solvent-resistant, compatible blends of polyphenylene ethers and thermoplastic polyesters Solvent-resistant resin blends with a wide variety of desirable impact and tensile properties are prepared from a polyphenylene ether having a low proportion of unneutralized amino nitrogen or a blend thereof with a polystyrene; a poly(ethylene terephthal... | 09/12/1989 |
| 4865873 | Electroless deposition employing laser-patterned masking layer A metal is electrolessly plated on a substrate which is first coated with at least one ablatively-removable layer that is selectively irradiated with laser radiation to obtain a pattern for the deposition of metal on the substrate. The electroless plating... | 09/12/1989 |
| 4865787 | Method for the impregnation of filament wound structures with thermoplastic binders Filament wound or dry lay-ups of structural shapes are impregnated with a binder of thermoplastic resin. Impregnation is achieve by adding a polymer solution to a centrifuge containing reinforcing material. The centrifuge is spun at high rotational speed.... | 09/12/1989 |
| 4864777 | Method of automated grinding Automated grinding is performed using a tracking means having a sufficient field of view to locate edges to be processed and using a high resolution profiler in order to provide grinding information for calculation of the amount of material which should b... | 09/12/1989 |
| 4866614 | Ultrasound characterization of 3-dimensional flaws This ultrasound imspection method using the Born approximation simplifies the problem of characterizing 3-dimensional flaws of general shape by reducing it to a series of 2-dimensional tomographic image reconstructions. The reconstructed 2-dimensional ima... | 09/12/1989 |
| 4864479 | Full-bridge lossless switching converter A full bridge integrable dc-to-dc converter is described which includes four FET switching devices wherein the parasitic capacitors of the switching devices exchange energy with the leakage and magnetizing inductances of the converter transformer. Since e... | 09/05/1989 |
| 4864380 | Edgeless CMOS device A common island complementary-metal-oxide semiconductor device comprising an island of semiconductor material disposed on an insulating substrate is disclosed. Both N-channel and P-Channel transistors are formed in the common island of semiconductor mater... | 09/05/1989 |
| 4864054 | Method for making cationically polymerizable aromatic polypropenyl ethers A method is provided for making cationically polymerizable aromatic polypropenylethers and to the aromatic polypropenylethers made thereby. Aromatic polyalkylene glycol prepared from the corresponding polyphenol is reacted with an allylhalide to produce a... | 09/05/1989 |
| 4864034 | Spiro(bis)indane bis-oxyphthalic acids and functional derivatives thereof Spiro(bis)indane bis-oxyphthalic acid bisimides are prepared by the reaction of a nitro- or halo-substituted phthalimide with a salt of a 6,6'-dihydroxy-3,3,3'3'-tetramethylspiro(bis)indane. The bisimides may be converted to the corresponding dianhydrides... | 09/05/1989 |
| 4864015 | Method for making thianthrene dianhydride and polyimides obtained therefrom A method is provided for making 9,10-dithiaanthracene-2,3,6,7-tetracarboxylic acid dianhydride. Polyimides having improved oxidative stability also are provided which can be made intercondensing organic diamine and the aforementioned dianhydride or a ... | 09/05/1989 |
| 4863998 | Polyphenylene ether amine salts, flame retardant extrudate of blends thereof, and method of making Polyphenylene ethers having chemically combined aminoalkyl groups are neutralized with a Bronsted acid to produce flame retardant polyphenylene ether Bronsted acid amine salts. The polyphenylene ether amine salts can be blended with polystyrene to produce... | 09/05/1989 |
| 4863992 | Polyalkoxysilyl-terminated polydiorganosiloxanes, methods for their preparation, and room temperature vulcanizable compositions containing them Polyalkoxysilyl-terminated polydiorganosiloxanes which are relatively stable in viscosity over prolonged storage periods are prepared by endcapping a silanol-terminated polydiorganosiloxane in the presence of a catalytic amount of an acidic amine salt whi... | 09/05/1989 |
| 4863984 | Flame retardant extrudate of polypheylene ether blends, and method of making Extrudate of polyphenylene ether-styrene resin blends having effective amounts of an organoamine salt has been found to have improved flame retardance.... | 09/05/1989 |
| 4863685 | Corrosion resistant zirconium alloys Zirconium-based corrosion resistant alloys are provided primarily for use as a cladding material for fuel rods in a boiling water nuclear reactor, the alloy in one embodiment consisting essentially of about 0.5-2.0 percent by weight of tin, about 0.5-1.0 ... | 09/05/1989 |
| 4863520 | Method for curing silicone coatings on plastic substrates, and curable compositions related thereto An improved method for forming a protective coating on a plastic substrate is disclosed, comprising the application of a curable coating composition which contains at least one alkyltrialkoxysilane in a water/organic solvent dispersion of the colloidal si... | 09/05/1989 |
| 4863517 | Via fill ink composition for integrated circuits A novel devitrifying frit is disclosed which has a coefficient of expansion essentially the same as that of silicon. The subject frits have a high softening temperature and excellent reheat stability which make them useful in ink formulations for forming ... | 09/05/1989 |
| 4862399 | Method for generating efficient testsets for a class of digital circuits A digital logic circuit is broken into functional blocks, each having a path from its output port to a chip level output port. No two input patterns to that path produce the same output pattern on that path and for every path input pattern there is a one-... | 08/29/1989 |
| 4862098 | Continuous-wave-modulation detectors using prediction methods A detector for a first continuous-wave-modulation signal is supplied an unmodulated carrier signal in addition to the first continuous-wave-modulation signal. Means are provided for modulating the unmodulated carrier signal responsive to output signal fro... | 08/29/1989 |
| 4862009 | Combined electric starter and alternator system using a permanent magnet synchronous machine A system for cranking/starting a combustion engine and for generating electrical power during engine operation uses an inverter-driven, high efficiency permanent magnet synchronous machine as a cranking/starting motor during a start mode and as an alterna... | 08/29/1989 |
| 4861960 | Real time adaptive control for resistance spot welding process This real time adaptive control and method of controlling a spot welding process compensates for electrode wear, oxidized surfaces, fit up variations and machine variations. Workpiece thermal growth is the measurement discriminant and the welding machine ... | 08/29/1989 |
| 4860500 | Passive actuator to maintain a constant normal cutting force during robotic deburring Precision control over the cutting force during robotic deburring and edge contouring is obtained by use of a "zero spring rate" driver. The driver consists of an air cylinder with a low friction piston. An accumulator is used in between an air supply lin... | 08/29/1989 |
