Abstract: Disclosed is a plastic drum having a circumferential recess in the sidewall of the drum near its top, in the form of a frustum of a cone and adapted to receive a one-piece snap-on metal ring carrier structure of a disclosed design that allows handling of the drum with fork lifts, parrot beaks and similar chime engaging devices.

Abstract: Copolyesters having an oxygen permeability of less than 15 cc. mil/100 in..sup.2 .multidot.day.multidot.atm. (at 50% relative humidity and about 73.degree. F.) and a glass transition temperature in excess of 72.degree. C. and having the following four (4) repeating units are contemplated: ##STR1## Based on reactant charges the ratio of (b) units: (a) units will be about 90:10 to about 40:60. Containers made of these polyesters for packaging products of commerce like comestibles are also contemplated.

Abstract: Disclosed is an assembly or matrix comprising an arrangement of integrally fused tubes forming a series of nonporous, longitudinal parallel passageways therethrough. The matrix is of a low-expansion ceramic material and the passageways therethrough have thin walls; a high proportion of the cross-sectional or frontal area of the matrix is free open area. Also disclosed are methods for making such a matrix from glass tubes that are thermally crystallizable; one method involves longitudinally bundling the tubes with their ends sealed and heating the assembly to soften, expand and fuse the tubes in a heat treatment schedule that also nucleates and thermally crystallizes the matrix to the final ceramic product. Another embodiment involves superimposing a plurality of layers of tubes, one layer above the other in successive parallel planes, with the tubes in each plane being essentially parallel to each other and transverse to the tubes in adjacent layers.

Abstract: Disclosed are phosphate glasses containing BaO, K.sub.2 O, Al.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 and containing only very low amounts of water and a method of making such glasses.

Abstract: Thermally stable high (beta)-cristobalite glass-ceramics suitable for making articles such as refractory linings for ovens, furnaces, and the like and which do not undergo transition to the low (alpha)-cristobalite crystal phases upon cooling of the ceramic to ambient temperature. A method for making such stable ceramics by melting a glass of the composition MO.Al.sub.2 O.sub.3.nSiO.sub.2 wherein the (Al.sub.2 O.sub.3 /MO) molar ratio is 1, MO is CaO or a mixture of CaO and MxO where Mx is a cation of the first, second or fourth group of the Periodic Table or iron and n is a positive number of from 8 to 37, and subjecting the glass to a heat schedule sufficient to form a stabilized high (beta)-cristobalite type crystal structure in the resulting glass-ceramic, with or without a portion of low cristobalite and/or feldspar crystals.

Abstract: Copolyesters having an oxygen permeability of less than 15 cc.multidot.mil/100 in..sup.2 .multidot.day.multidot.atm. (at 50% relative humidity and about 73.degree. F.) and a glass transition temperature in excess of 72.degree. C. and having the following four repeating units are contemplated: ##STR1## Based on reactant charges the ratio of (b) units: (a) units will be about 90:10 to about 40:60. Containers made of these polyesters for packaging products of commerce like comestibles are also contemplated.

Abstract: Thermally crystallizable glasses of the Na.sub.2 O--Ta.sub.2 O.sub.5 --SiO.sub.2 and the Na.sub.2 O--Li.sub.2 O--Ta.sub.2 O.sub.5 --SiO.sub.2 systems, and glass-ceramics made therefrom which are highly transparent, have high indices of refraction, and excellent strength properties. By varying the heat treatment schedule for crystallization of a glass to a glass-ceramic, a specific high index of refraction coming within a prescribed range may be imparted to the finished, transparent glass-ceramic. A transparent glass-ceramic having two or more different indices of refraction may also be produced.

Abstract: A method for recovering Tb.sub.4 O.sub.7 from a glass containing terbium oxide is disclosed, the method including the steps of:I. fusing the glass containing terbium oxide with NaOH to provide a solid fusion product;Ii. slurrying the fusion product of Step I to disperse solid particles of Tb.sub.4 O.sub.7 and any Li.sub.2 SiO.sub.3 present and to dissolve any Al.sub.2 O.sub.3, NaOH and Na.sub.2 SiO.sub.3 to thereby separate the same from the solid particles of Tb.sub.4 O.sub.7 ;Iii. reacting the solid particles of Tb.sub.4 O.sub.7 of Step II with HNO.sub.3 to provide Tb(NO.sub.3).sub.3 ;Iv. reacting the Tb(NO.sub.3)3with oxalic acid to form Tb.sub.2 (C.sub.2 O.sub.4).sub.3 ; andV. firing the Tb.sub.2 (C.sub.2 O.sub.4).sub.3 to form CO.sub.2 and solid Tb.sub.4 O.sub.7 to that is recovered from the glass.

Abstract: Thermally stable high (beta)-cristobalite glass-ceramics suitable for making articles such as refractory linings for ovens, furnaces, and the like and which do not undergo transition to the low (alpha)-cristobalite crystal phases upon cooling of the ceramic to ambient temperature. A method for making such stable ceramics by melting a glass of the composition MO. Al.sub.2 O.sub.3.nSiO.sub.2 wherein the Al.sub.2 O.sub.3 MO molar ratio is 1, MO is CaO or a mixture of CaO and MxO where Mx is a cation of the first, second or fourth group of the Periodic Table or iron and n is a positive number of from 8 to 37, and subjecting the glass to a heat schedule sufficient to form a stabilized high (beta)-cristobalite type crystal structure in the resulting glass-ceramic, with or without a portion of low cristobalite and/or feldspar crystals.

Abstract: Contacting the vapor product of an ethane oxychlorination reaction with relatively cold, liquid, aqueous hydrogen chloride to produce an absorbate containing substantial amounts of inorganic constituents, including hydrogen chloride and water, that were in the vapor product. At least a portion of the absorbate is then distilled at a first pressure, usually above atmospheric pressure, to produce an overhead, usually hydrogen chloride, and aqueous hydrogen chloride bottoms which are usually of substantially azeotropic concentration at the first pressure. These bottoms are then distilled at a second pressure, usually atmospheric pressure, to produce an overhead, usually water, and bottoms of aqueous hydrogen chloride, usually of substantially azeotropic concentration at the second pressure.

Abstract: Disclosed are ferrimagnetic glass-ceramics prepared by the in situ, thermal crystallization of certain nickel-zinc; manganese-zinc; and manganese-magnesium crystalline ferrites in a residual glassy matrix.

Abstract: A thermally crystallizable glass consisting essentially of 45-57 SiO.sub.2, 29-38 Al.sub.2 O.sub.3, 13-22 Na.sub.2 O, in parts by weight, and the parts totalling 100. For each of these 100 parts, the glass contains 0.5-5 parts of ZrO.sub.2 and 1-10 parts of ZnO. The five constituents constitute at least 95 weight percent of the total glass and a thermally crystallized glass-ceramic article suitable as kitchen ware or table ware is made from this glass.

Abstract: Thermally crystallizable glasses of the Na.sub.2 O--Ta.sub.2 O.sub.5 --SiO.sub.2 and the Na.sub.2 O--Li.sub.2 O--Ta.sub.2 O.sub.5 -SiO.sub.2 systems, and glass-ceramics made therefrom which are highly transparent, have high indices of refraction, and excellent strength properties. By varying the heat treatment schedule for crystallization of a glass to a glass-ceramic, a specific high index of refraction coming within a prescribed range may be imparted to the finished transparent glass-ceramic. A transparent glass-ceramic having two or more different indices of refraction may also be produced.

Abstract: Glass compositions, free of alkali metal, are disclosed which are suitable for a wide variety of purposes, particularly in the electronics industry. The glasses have good working properties and resist uncontrolled devitrification. Characterized by low to moderate thermal expansion properties, the glass compositions generally contain the following components expressed as oxides in the indicated amounts based on the total weight of the composition:______________________________________ SiO.sub.2 50-62 Al.sub.2 O.sub.3 8-15 ______________________________________and at least one RO oxide as follows: ______________________________________ CaO 0-25 BaO 15.5-32 MgO 0-2.4 ______________________________________and wherein the sum of the RO oxides is at least 23%.

Abstract: A foaming sealant or cement for use in securely joining shaped thermally crystallizable glass bodies and shaped glass-ceramic bodies previously formed by thermal in situ crystallization of thermally crystallizable shaped glass bodies wherein the sealant consists essentially of from (1) about 80-99% by weight of a glass frit having SiO.sub.2, Al.sub.2 O.sub.3, Li.sub.2 O and usually CeO.sub.2 as the essential ingredients, (2) about 2-15% by weight of ZnO powder when the mole percent of the CeO.sub.2 in the glass frit is below about 2, and (3) an amount by weight of SiC powder sufficient to be decomposed during the firing of the sealant to form gas which, in turn, foams the sealant. Such sealant can be fired and bonded to shaped glass-ceramic bodies at temperatures below 2192.degree. and as low as 2150.degree. F and even lower. The sealant is dimensionally stable when subjected to high temperatures over long periods of time and has an average coefficient of thermal expansion of from about -15 .times. 10.sup.-.

Abstract: Disclosed are low expansion, chemically resistant, ceramic articles containing keatite as the principal crystalline phase. The articles are prepared from compositions in the Li.sub.2 O.Al.sub.2 O.sub.3.SiO.sub.2 field. In preparing this ceramic article, a glass having the desired composition is formed into the appropriate shape by molding the molten glass, compaction and sintering of glass particles or by other conventional glass and ceramic forming processes. The article thus formed is then crystallized to keatite solid solution by an appropriate heat treatment followed by acid leaching in a strong but diluted aqueous acid to produce a ceramic material having the hydroxy aluminosilicate crystalline structure. The hydroxy aluminosilicate ceramic article is then thermally dehydrated to produce a ceramic article containing keatite as a crystalline phase together with mullite with or without the presence of other phases such as amorphous or glassy SiO.sub.2, quartz and nucleants.

Abstract: Disclosed is a method of producing hard glass-ceramics from a melt of basalt enriched with one or more of CaO, MgO and SiO.sub.2 to achieve defined ratios of certain oxides in the batch, cooling the melt to a glass and thermally in situ crystallizing the glass to a highly crystalline glass-ceramic product containing a diopside solid solution as the principal phase.

Abstract: Thermally crystallizable glasses of theA -- Nb.sub.2 O.sub.5 --GeO.sub.2 systemwherein A is K.sub.2 O, Li.sub.2 O or a mixture of K.sub.2 O and Li.sub.2 O and glass ceramics made therefrom are described. Transparent and opaque glass ceramics may be obtained. The glass ceramics are particularly suitable for use in printed optical circuits, fiber optics, gradient refraction optical lenses and as wave guides.

Abstract: Disclosed are B.sub.2 O.sub.3 -containing glass-ceramic bodies made by in situ thermal crystallization of glasses and useful as a host for diffusion doping of semiconductors by the vapor phase transport of B.sub.2 O.sub.3 to the semiconductor from the glass-ceramic which in mole percent consists essentially of over 40 and up to 60 SiO.sub.2, 10 to 30 Al.sub.2 O.sub.3, 20 to 40 B.sub.2 O.sub.3 and 3 to 20 alkaline earth oxides including 1 to 15 BaO wherein the ratio of Al.sub.2 O.sub.3 to alkaline earth oxides is from 1.5 to 4.

Abstract: Disclosed is a method for diffusion doping of silicon and germanium semiconductors by the vapor phase transport of B.sub.2 O.sub.3 from a solid B.sub.2 O.sub.3 source to the silicon semiconductor, wherein the solid B.sub.2 O.sub.3 source comprises a rigid, dimensionally stable, glass-ceramic body containing at least about 10 mole percent of B.sub.2 O.sub.3 in the glassy phase, the crystalline phase, or both.