Abstract: In a color liquid crystal display device of the invention, light-blocking members of predetermined configurations (characters, graphics etc.) are disposed on the surface of one side of a liquid crystal display element, that is to say the surface on the side opposite to the light source, and the predetermined configurations are displayed on the color liquid crystal display device by blocking the light from the light source with the light-blocking members. Further, a light-scattering plate is disposed between the light source and the liquid crystal display element, or between the liquid crystal display element and the light-blocking members. It is possible to allow transmission of a part of the light blocked by the light-blocking members by scattering the light which is transmitted through the liquid crystal display element with the arrangement of the light-scattering plate.

Abstract: An antiferroelectric liquid crystal display device including a specific antiferroelectric liquid crystal composition layer comprising at least one compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents an optionally substituted alkyl or alkoxy group having 1 to 15 carbon atoms, R.sup.2 represents an optionally substituted alkyl group having 1 to 15 carbon atoms, X represents a hydrogen or fluorine atom, m and n independently represents an integer 1 or 2, and * represents an asymmetric carbon atom, and at least one compound represented by the following general formula (II): ##STR2## wherein R.sup.3 represents an optionally substituted alkyl or alkoxy group, having 1 to 15 carbon atoms, R.sup.4 represents an optionally substituted alkyl group, having 1 to 15 carbon atoms, ##STR3## X represents a single bond or --COO--, Y represents a single bond, --O--, or --COO--, and k represents an integer 0 or 1.

Abstract: A process is disclosed for adjusting the green/blue emission ratio in a terbium-activated gadolinium oxysulfide x-ray phosphor, which comprises forming a uniform mixture of gadolinium oxide, sulfur, sodium carbonate, sodium hydrogen phosphate, and terbium oxide, firing the mixture in a closed vessel in an air atmosphere to form the phosphor, washing the phosphor with deionized water to remove essentially all of any water soluble impurities which are present, and deagglomerating and annealing the phosphor in air at a temperature of from about 400.degree. C. to about 600.degree. C. for a sufficient time to form the phosphor. The terbium concentration and firing temperature and firing time are controlled to attain the desired green/blue emission ratio. As the terbium concentration increases, the ratio increases. As the firing temperature and time increase, the ratio decreases.

Abstract: An electrophotographic photoreceptor comprising a photosensitive layer which contains one or more hydrazone compounds represented by the formula: ##STR1## wherein A represents a substituted or unsubstituted aryl or heterocyclic group; R.sup.1, R.sup.2 and R.sup.5 are the same or different from each other and independently represent a hydrogen atom, or a substituted or unsubstituted alkyl or aryl group; R.sup.3 and R.sup.4 are the same or different from each other and independently represent a hydrogen atom, a halogen atom, a nitro group, or a substituted or unsubstituted alkyl, alkoxy, aryl or aryloxy group; R.sup.6 represents a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl or alkoxy group; R.sup.

Abstract: A consolidated tungsten alloy body consisting essentially of from about 70% to about 98% by weight of tungsten, balance nickel and iron in essentially an 8:2 weight ratio. A process for producing the consolidated bodies where the tungsten content is greater than about 88% by weight comprises forming a relative uniform blend of the described metal powders, compacting the powders to form a green body then liquid phase sintering the green body to full density. For alloys containing less than about 90% tungsten solid state sintering can be used.

Abstract: A process is disclosed for purifying molybdenum containing arsenic and phosphorus which involves leaching molybdenum trioxide in an acid at a temperature of above about 70.degree. C.

Abstract: A method is disclosed for controlling the level of oxygen in molybdenum metal powder, which comprises agglomerating and sintering the molybdenum powder, classifying the resulting agglomerated and sintered molybdenum powder to obtain a particle size of from about -200 to about +325 mesh, contacting the resulting classified powder with a sufficient amount of an aqueous solution of hydrogen peroxide containing from about 1% to about 10% by weight of hydrogen peroxide to yield a molar ratio of H.sub.2 O.sub.2 :Mo of from about 2 to about 5 for sufficient time to achieve an oxygen content in the powder of from about 1% to about 15% by weight wherein the major portion of the oxygen is on the surface of the agglomerates, and removing the resulting hydrogen peroxide-treated molybdenum powder agglomerates from the resulting solution.

Abstract: A method of separating tungsten from molybdenum wherein impure acid leached molybdenum trioxide containing tungsten is combined with ammonium hydroxide to form an ammonium molybdate solution, the solution is contacted with tin (IV) oxide hydrate to cause sorption of essentially all of the tungsten contained therein without causing sorption of molybdenum, the tin (IV) oxide hydrate with the sorped tungsten is separated from the ammonium molybdate solution, and the ammonium molybdate solution is dried and fired to obtain purified molybdenum trioxide.

Abstract: A consolidated tungsten alloy body consisting essentially of from about 60% to about 98% by weight of tungsten, balance, nickel and iron, containing a continuous phase of tungsten and a discontinuous phase of grains of a tungsten, nickel and iron alloy having an aspect ratio of at least 4:1 relatively uniformly distributed throughout the continuous phase and wherein said body has a recrystallization temperature of from about 1000.degree. C. to about 1200.degree. C. A process for producing the consolidated bodies comprises working and annealing at controlled temperatures to achieve the desired properties. The working temperatures are from about 700.degree. C. to about 900.degree. C. and the annealing temperature is preferably 1200.degree. C.

Abstract: A process for eliminating an industrial waste sludge by converting its metal values into useful products involves the selective leaching of Mn, divalent Fe, and other valuable metals, such as Sc, Co, Cr, Ni, Th, rare earths, etc. with a mixture of dilute sulfuric acid and a reductant at ambient temperature. Scandium is recovered by passing the leachate through an ion exchange column which is packed with a weakly cationic resin. The retention of other metals on the resin column is negligible. The scandium is eluted from the resin column and converted to a solid product. The raffinate from the ion exchange column is titrated with an alkali solution to convert the metals, except divalent Mn and Fe, to a solid metal hydroxide. After the separation the filtrate is treated with an alkali and an oxidant to recover iron as a solid product of iron oxide which is separated from the solution.

Abstract: A tungsten carbide powder and cemented tungsten carbide article made from the powder are disclosed. The powder has a particle size of greater than 20 micrometers in diameter and no particles less than one-half the average particle size or greater than two and one-half times the average particle size.

Abstract: A composition is disclosed consisting essentially of substantially spherical glass particles having a diameter of less than about 25 micrometers.A process is disclosed for producing substantially spherical particles. The process involves providing irregularly shaped glass particles having a predetermined particle size, entraining the particles in a carrier gas, feeding the entrained particles into a high temperature zone having a temperature sufficiently above the softening point of the glass to allow surface tension to subsequently spheroidize the particles and having a temperature below the vaporization temperature of the glass.

Abstract: A method is disclosed for deforming a molybdenum based metal part, which involves press forging a powder metallurgically produced part made of material selected from the group consisting of molybdenum metal and molybdenum metal alloys, at a temperature of from about 1700.degree. F. to about 2300.degree. F. at an average strain rate of from about 5 inches per minute to about 20 inches per minute.

Abstract: A powder compacting press wherein one or more upper and one or more lower punches are respectively advanced toward each other in a die filled with an amount of powder to producing a pressed part in the shape of the die and punch configuration. The press including measuring device on the upper and lower punches to measure the peak forces applied to the upper and the lower punches and to generate a first signal proportional to the forces, calculating device for receiving the first signal and calculating the ratio of the forces of the upper and lower punches and transmitting a second signal that is proportional to the ratio, and adjusting device for receiving the second signal and adjusting the forces applied to each punch based upon the second signal to achieve a predetermined green density distribution in the pressed part whereby substantial uniformity in part dimensions is achieved.

Abstract: A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of titanium based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends. The material has a particle size of less than about 50 micrometers. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder which is then entrained in a carrier gas and passed through a high temperature zone above the melting point of the finer powder to melt at least about 50% by weight of the powder and form spherical particles of the melted portion. The powder is then directly solidified.

Abstract: A process for purifying molybdenum, which comprises first leaching impure molybdenum trioxide containing potassium in a liquid medium of nitric acid, and an ammoniacal liquor, wherein the nitric acid concentration is about 3.5 to 4.0 moles per liter and the ammonium nitrate concentration is about 0.5 to 1.0 moles per liter, at greater than 50.degree. C. to solubilize the major portion of the potassium and produce a once-leached molybdenum trioxide and a first liquor, removing the once-leached molybdenum oxide from the first liquor, re-leaching the once-leached molybdenum trioxide in nitric acid having a concentration of about 3.5 to 4.0 moles per liter, at greater than 50.degree. C. to produce a twice-leached molybdenum trioxide and a second liquor, removing the twice-leached molybdenum oxide from the second liquor, water washing the twice-leached molybdenum trioxide, digesting the molybdenum trioxide in ammonium hydroxide at greater than 50.degree. C. at a pH of greater than 9.

Abstract: A process for producing finely divided spherical iron group based metallic powders comprises forming an aqueous solution containing a source of the appropriate metal sources in a mineral acid, forming a reducible iron group based material from the solution, reducing the material to iron group based metal powder particles, subjecting the metal particles to a high temperature zone to melt a portion of the particles and to form droplets and cooling the droplets to form an essential spherical iron group based metallic powders.

Abstract: A cadmium-free cathodoluminescent phosphor composition consists essentially of zinc sulfide activated with from about 0.019% by weight to about 0.024% by weight of copper and from about 0.01% by weight of about 0.02% by weight of aluminum wherein the emission of the phosphor upon stimulation by cathode rays has CIE values of x of from 0.287 to 0.291 and y from 0.616 to 0.620. The process involves solid state heating of the various raw materials wherein a first relatively pure zinc sulfide and a second zinc sulfide containing chloride ions are mixed with the appropriate levels of and alkali metal chloride and sources of copper and aluminum activators and then heated in a nitrogen-carbon disulfide atmosphere for about 3 hours at 1775.degree. C. to about 1825.degree. C.

Abstract: A manganese activated zinc silicate phosphor and method for producing same is disclosed which comprises dry blending a mixture of components consisting essentially of zinc oxide, silicic acid, a source of manganese, ammonium chloride, ammonium fluoride, tungstic oxide and silica wherein the Zn+Mn/Si mole ratio is from about 1.95 to about 2.02, wherein the silica is colloidal and has a surface area of from about 50 to about 410 m.sup.2 /g, and wherein the colloidal silica makes up from about 0.01% to about 1.0% by weight, firing the blend in a nitrogen atmosphere at a temperature of from about 1200.degree. C. to about 1300.degree. C. for a sufficient time to produce the phosphor, and firing the phosphor in air at a temperature of from about 1175.degree. C. to about 1275.degree. C. for a sufficient time to diffuse the tungsten and manganese to the surfaces of the phosphor particles. Between the firing steps, the phosphor can be milled for from about 60 to 120 minutes to increase luminescence.

Abstract: An ultrathin-wall sintered fluoropolymer tube is disclosed which has a wall thickness less than about 0.002 inch (0.051 mm). Also, disclosed are fluoropolymer tubes which have been extruded over and are supported by a removable, sintered fluoropolymer core. Preferably the fluoropolymer core contains an inorganic filler such as glass beads. Integral multilayered tubes which can be used as automotive cables or medical catheters are also disclosed. These multilayered tubes have an inner lubricious sheath comprises of the afore-described sintered fluoropolymer tube, with or without the removable fluoropolymer core, surrounded by an outer sheath comprised of one or more different materials.