78results about How to "Maintain density" patented technology

A radial cell ceramic honeycomb structure is provided that is particularly adapted for use as a catalytic carrier or a particulate filter in an automotive or diesel exhaust system. The honeycomb structure includes a network of interconnected webs having a central axis. The network of webs includes radial webs of varying lengths, only some of which substantially extend the entire radial length of the network, and tangential webs that intersect to define rings of gas-conducting radial cells, and a rounded outer skin that surrounds the cells formed by the interconnected webs. The radial webs extending to the periphery of the network join an inner edge of the outer skin in a substantially orthogonal orientation to reduce thermally generated stresses and to increase strength of the resulting structure. The number of radial webs in the network changes along the radial length at transition zones that are defined by one of the tangential webs such that a desired cell density is achieved across the network.

Brine-based well treatment compositions containing alkali nitrate exhibit greater thermal stability when used in deep wells than substantially similar brine-based well treatment compositions which do not contain an alkali nitrate. The brine is thickened with a water-soluble crosslinkable polymer and crosslinking agent. The enhanced thermal stability of the well treatment compositions allows use of the fluids at elevated temperatures, for instance as high as 400° F.

To provide a sintered silicon nitride with conductivity and densification, an oxide of titanium group elements, such as titanium oxide, hafnium oxide, zirconium oxide and the like, aluminum oxide and / or aluminum nitride is added as needed to silicon nitride-oxidant of rare-earth elements-aluminum oxide system or silicon nitride-oxide of rare-earth elements-magnesia system, and then specified quantity of carbon nonotube (CNT) is added to the above mixture. CNT generates silicon carbide after the reaction with contiguous or proximal silicon nitride and the like depending on the sintering duration at high temperature. Since silicon carbide is generated along with nanotubes, the silicon carbide functions as conductor with excellent heat resistance, corrosion resistance and the like.

The present invention provides contraceptive regimens in which a female is administered a combined dosage form of estrogen and progestin followed by a period of administration of estrogen. The disclosed contraceptive regimens can be administered to a female as a method of providing non-contraceptive benefits.

The present invention provides a method of manufacturing a wiring board, including the steps of forming a through hole on a prepreg having a releasing resin film on at least one of its surfaces, the prepreg being obtained by impregnating a porous film having a thickness of 5 to 90 mum and a porosity of 30 to 98% with a half cured thermosetting resin, filling the through hole with a conductive paste containing a conductive filler, peeling the resin film, laminating a metal foil on a surface from which the resin film is peeled, and heating and pressurizing the laminated product. Moreover, the present invention provides a wiring board including an insulating layer obtained by impregnating a porous film having a thickness of 5 to 90 mum and a porosity of 30 to 98% with a thermosetting resin and curing them, and a conductive connection structure between wiring layers in which a through hole provided on the insulating layer is filled with a conductive paste, wherein the conductive connection structure has the conductive filler at only a boundary surface with the porous film and in an inner part thereof.