Abstract: A method for on-line monitoring and/or control of an electric arc furnace utilizing a method of data transfer between a programmable logic controller and a microprocessor comprising monitoring data from the furnace over a fixed time cycle, assigning data values to the monitored data during such time cycle, dividing the fixed time cycle into a multiple of N time subintervals, dividing the data values into data subsets, assigning designated time subintervals to each of the data subsets, transmitting data to the microprocessor in each time subinterval to execute program code corresponding to the data subset in such time subinterval and calculating control factors from the transmitted data for providing control information.

Abstract: An electrolytic process for stripping a group IVB or VIB metal coating compound from a titanium based metal substrate using an aqueous electrolyte comprising an oxidizing reagent and an acid with a solution pH of less than 4.5.

Abstract: This invention relates to a color controlled disinfecting peroxide cold sterilization composition employing an iodide salt and to a method for controlling the formation and duration of color when such composition is combined with water.

Abstract: A powder comprising an alloy of a refractory material and carbothermic reaction product produced by carbothermically reacting a blend of at least two metal oxides.

Abstract: A method for producing sintered shapes of refractory powders with improved strength and toughness using a grain growth inhibiting powder to inhibit grain growth.

Abstract: A dental composition and method for bleaching vital and non-vital teeth, comprising a preselected, concentrated, aqueous solution of hydrogen peroxide and a nonaqueous component mixed to form an aqueous gel or paste, with the nonaqueous component including an inert silica gelling agent, an accelerator, a plasticizer and thickening agent, and means for establishing a substantially fixed time period for treating the teeth in response to the application of optical energy. A redox color indicator is used to transform from one color to another over the fixed time period to provide a visual indication that the treatment is completed, as well as an indication that the peroxide solution was active.

Abstract: A method of sealing the surfaces of porous carbon and graphite articles by impregnation at ambient pressure using a treating solution comprising a high temperature polymerizable liquid resin. The liquid treating solution, when upon the surface of the article, is of sufficiently low viscosity to allow infiltration of the treating solution into the pores of the surface of the article. The treated article then undergoes a controlled heating cycle, which cures the infiltrated resin in situ. Subsequent treatments and surface conditioning techniques are utilized to produce a thin, level, liquid and gas impervious coating on the surfaces of the article.

Abstract: A pyrolytic boron nitride with a highly oriented crystalline morphology of twinned boron nitride crystallites is produced by addition of a trace amount of zirconium into the boron nitride.

Abstract: A carbonaceous cement for joining carbon and graphite shapes contains carbonaceous particles, a furan and catalyst, and a thermosetting resin resistant to high temperatures when curved. The cement forms bonds of superior strength at high temperatures encountered during curing of high-performance composites.

Abstract: A method for forming a dense metal boride composite article having a predetermined shape in which the method comprises blending a metal boride and a nitride to form a mixture of particles, milling the particles to a desired size, coating the particles with a lubricant formed from a polyvinyl acetate, cold forming the particles into an article of desired shape and pressureless sintering the cold formed article.

Abstract: A process to form a uniform metal boride coating on a carbonaceous substrate by first forming a metal carbide coating and reacting the carbide coating with a boron compound.

Abstract: A coated article suitable for use in a vacuum consisting essentially of a refractory metal substrate and a first coating of TiB.sub.2 and Mo. An overcoat of TiB.sub.2 may be applied to the first coating as a second layer upon which additional layers may be applied if desired.

Abstract: A plasticizer for use in the manufacture of pitch which forms a fluid at room temperature consisting essentially of a tar composed of low molecular weight and polymerized aromatic hydrocarbons having a molecular weight distribution characteristic which is bimodel. The plasticizer is formed by reacting a tar or distillate precursor with oxygen under controlled conditions of temperature and time.

Abstract: The prefabricated dental pontic of the present invention comprises a metal body having a mesiodistal dimension shorter than the span between the abutment teeth separating an edentulous space to be filled with the pontic and an arm extending from each opposite end of the metal body with each arm having a trough-like channel. A pontic connector is preferably used to mount each arm to a retaining member mounted on each abutment tooth.

Abstract: The method comprises forming a sporocide having a defined period of sporocidal activity comprising three components including a peroxide or peroxide generating material, a peroxidase and a salt of iodide which serves as a donor molecule; storing the three components in a nonreacting state to maintain the sporocide in an inactive state and admixing the three components in a aqueous based carrier to cause a catalyzed reaction by said peroxidase for generating free radicals and/or byproducts from the iodide salt (donor molecule) and contacting the surface or object to be sterilized with the activated mixture. The concentration level of the three components can be selected such that an active sporocidal state is maintained for any desired period of time.

Abstract: An electrically driven double-acting diaphragm air pump having a diaphragm-driven system including an eccentric for the motor shaft, a freely movable yoke having a solid framework solely supported by the diaphragm system with one end connected to a first diaphragm assembly, and at an opposite end to a second diaphragm assembly, and with the yoke having a large central opening. The eccentric is coupled directly to the solid framework through a yoke driver. The yoke driver is rotatably connected to the solid framework at one end of the framework adjacent to the first diaphragm assembly, and is coupled to the eccentric through ball bearings, with the opposite end of the yoke driver suspended for free movement within the large central opening of the solid yoke framework.

Abstract: A process and apparatus for coating a substrate with source material from a solid cathode in a vacuum chamber supplied with a reactive or inert gas at low pressure. An electric arc is generated between an evaporable end surface of the cathode and an anode. An elongated member surrounds the cathode and extends a predetermined minimum distance "X" beyond the evaporable end surface of the cathode to form a cathode chamber. The inert or reactive gas is directed to flow into the cathode chamber before entering the vacuum chamber.

Abstract: This invention relates to a dental floss applicator for flossing teeth with dental floss supplied from the applicator. More particularly, the present invention relates to a dental floss applicator for dispensing dental floss and for securing a pre-selected length of dental floss between a supply and take up unit to permit the flossing of teeth without hand contact in the mouth.

Abstract: A Temporomandibular Joint disc implant for functionally replacing an irreparable human temporomandibular disc formed of a compressible pouch-like body having at least one outer surface layer of resilient biocompatible material enclosing a filling solution or a matrix of fibrous or open-cell material(s) and a filling solution. The fluid forming the filling solution is adapted to be introduced into the body through the surface layer(s) when surgically implanting the disc.

Abstract: The dental jacket crown of the present invention is prepared from a thin metal foil substrate which is coated with a noble based metal composition having a low fusing temperature and folded in a predetermined manner to form multiple folds in the form of triangular like flaps or pleats. The folded foil represents the coping of the present invention. The coping is mounted over a die of the prepared tooth and the flaps wrapped in overlapping formation and then adapted to the die. The die is removed and the structure heated preferably under a bunsen burner. A bonding material may be coated over the free standing structure if desired. A veneering material such as porcelain is then coated over the structure to form the crown.