Abstract: An oxygen sensing package includes a solid electrolyte sensor and a silicon carbide heating element arranged so as to surround the solid electrolyte and radiate heat to it from convex surfaces.

Abstract: This invention is directed to a method for reducing the mass of a tumor in animal tissue utilizing localized, magnetically-coupled, RF-induced hyperthermia. The method involves the implanting of a material in and/or closely adjacent to the tumor which is non-toxic to, and preferably inert to and compatible with, normal tissue and which has encapsulated therewithin ferromagnetic particles of such size, amount, composition, and ferromagnetism to develop a heating value of up to about one watt/gram, through essentially only hysteresis heating, under an applied field of about 20 but less than 200 oersteds at a frequency greater than 10 kilohertz and ranging up to about 600 kilohertz, or under an applied field of at least about 2000 oersteds and a frequency below about 40 hertz. Such heating value is sufficient to kill the tumor cells but muscle and nerve response of the animal body to the induced emf is minimized.

Abstract: A method of chemically strengthening a sodium silicate glass is disclosed wherein ions from the glass are exchanged for larger ions, e.g. Na.sup.+ for K.sup.+, at a temperature above the glass strain point, subsequently the same exchange is carried out below the glass strain point, and the glass article is maintained throughout the process in a single, temperature-programmed bath containing the large exchangeable ions.

Abstract: The instant invention is directed to a noninvasive tumor treatment modality which results in a reduction of tumor mass and may lead to complete eradication of a tumor. The inventive method comprises localized magnetically-coupled, RF-induced hyperthermia mediated by a material which is non-toxic to and, preferably, compatible with animal tissue and has incorporated therewithin iron-containing crystals of such size, amount, composition, and magnetic properties to impart a coercive force of at least 200 oersteds to the material, and wherein the RF magnetic field has a frequency not in excess of about 10 kilohertz.

Abstract: Ceramic articles are provided with cadmium red-based decorations of improved chemical durability, by firing the decorations onto the articles at high temperatures. The cadium red-based enamels used for decoration are protected against color burn-out during high-temperature firing by a color stabilizing agent consisting of a fritted, sinterable, devitrification resistant alkali borosilicate glass which is combined with the enamels prior to firing.

Abstract: An electrical heating unit of the integral element type, comprising a platinum film heating element bonded to a supporting ceramic plate, wherein the platinum film heating element is electrically stabilized and physically protected by a lead titanate overglaze, is described.

Abstract: Microwave energy is utilized to energize an electroconductive film on a surface of a microwave browning apparatus to brown surface portions of foodstuff retained within said apparatus by conducting heat from said energized film through said browning apparatus to surface portions of the foodstuff. The microwave browning apparatus is provided with a recess below the electroconductive film, substantially surrounded by support portions, which function to focus or redirect the microwave energy toward central portions of the film or coating on the browning apparatus so as to provide more uniform browning temperatures across the coated surface.

Abstract: Heat-resistant masking compositions suitable for use in masking vitreous and semicrystalline ceramic surfaces from coating by liquid-sprayed coating compositions to provide permeation-resistant masks which are readily removable even after high temperature firing are described. The masking compositions comprise bentonite clay and a finely-divided refractory inorganic oxide release agent.