Crude oil in a subterranean formation is recovered through the injection of at least one phase formed from a composition within the multiphase region of an oil-water-surfactant ternary diagram. One embodiment includes the injection of two or more mutually immiscible phases which would be in phase equilibrium within the multiphase region in the ternary diagram of a microemulsion system, at least one of the phases being a microemulsion. Low interfacial tensions exist between the immiscible phases ...

A method and apparatus for testing a sample by means of luminescent reaction to detect reactive materials therein. A light-transparent filter is provided to filter the sample and to carry the residue to a reaction position. A light-transparent surface is provided to carry a reagent to the reaction position. Both surfaces are brought into mutual contact in a region between two photodetectors, which thereby detect the resulting luminescent reaction to provide an indication of the quantity of react...

A tool, providing an extensible or a non extensible straight edge, that can be rapidly attached and firmly held to an object to be sawed, by either a hand saw or a power saw.

A continuous autogenous multi-stage process for converting non-ferrous metal sulfides, in an oscillating, elongated, gently sloped, sealed, tiltable, rounded cross-section furnace, discharging crude metal or low-iron matte at one end, and silicate slag and sulfur dioxide-rich gas at the other end. The concentrates, fluxes, commercial oxygen, sulfur dioxide, a carbonaceous reducing agent and optionally other materials are introduced into the furnace in stages to provide a molten bath of slag and ...

A method is disclosed for copying a graphic representation using a uniformly poled pyroelectric material. The uniformly poled pyroelectric material is selectively heated to form a differential charge pattern on the material. The differentially charged material can be used with charged toner particles to form a copy of the graphic representation using techniques well known in the art.

Mineral values are recovered in situ by generating a leaching agent in the formation containing the mineral to be recovered.

Superficial wounds in the skin are treated by the application thereto of a bandage in frozen condition. The bandage is provided with a heat transfer means, and may have medication or refrigerant incorporated therein. The medication is released upon thawing.

Apparatus is provided for the purification of a liquid, especially blood, which comprises: A. an ultrafiltration cell and an ultrafiltration membrane dividing said cell into two compartments, an inlet and an outlet for said first compartment for the liquid to be treated and an outlet for the ultrafiltered liquid for said second compartment; B. means for establishing in the first compartment of said ultrafiltration cell a pressure higher than that prevailing in the second compartment of the cell;...

An improvement in a container for tubular-like articles and the method of using the improved container, the improvement comprising embodying a plurality of holes in the front and back of the basic container for supplying jets of aeriform fluid to the interior of the container to disturb or agitate, and lubricate the articles contained therein, and a hole opposite a lowermost baffle in the container for supplying a jet of aeriform fluid therethrough to in effect provide a gating means for stoppin...

A modular boiler having a cylindrical combustion chamber made of three modules and a module comprising a cover and a module comprising an expansion vessel mounted coaxially on the boiler adjacent the combustion chamber at opposite ends thereof. The cover has a frustro-conical configuration with the inner walls thereof diverging from an opening in the cover toward the interior of the combustion chamber at an angle of between 30.degree. and 110.degree.. The combustion chamber is formed of three ca...