In order to perform both digital and analog functions when relatively small loads are encountered by fluid leaving its vent passages, a pure fluid control element comprises main fluid inlet means supplied with a fluid to be controlled, fluid flow outlet means disposed downstream of the main fluid inlet means at a predetermined distance to receive the controlled flow from the main inlet means, vortex means between the main fluid inlet means and fluid flow outlet means for producing a vortex flow ...

This invention relates to pure fluidic units and devices, and more particrly to impedance-matching in pure fluid devices. Accordingly a pure fluid device is provided for the purpose of de-coupling one fluidic unit from another when they are staged. The fluidic de-coupler of the instant invention utilizes a novel two-sided vent design in the receiver line of the fluidic unit. Specifially, a square velocity profile is obtained in the receiver line by passing the flow in the receiver through an exp...

A compact pure water supply device automatically retains a constant predetermined level in the storage tank and renders a visual indication of the requirement for ion regeneration by means of a transistorized control circuit.

Generally spherical metallic powder of small size is produced in large quantities by extending a long bar of the material to be processed into a closed chamber through a sealed port, rapidly rotating the bar while striking an arc between it and a stationary electrode to melt portions of the bar and cast off these portions by centrifugal force to form the powder, and axially feeding the bar toward the electrode during consumption to maintain a fixed spark gap. When the bar is nearly fully consume...

A pure fluid amplifier which projects a laminar power stream and includes a control section for developing a pressure differential across the projected laminar power stream for a substantial portion of the length of the power stream (preferably a portion of the length of the power stream at least equal to four times the width of the power stream emission orifice) so as to angularly displace the power stream while maintaining the power stream laminar at all points in advance of the receiver apert...

The invention relates in particular to the compounds of general formula ##STR00001## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 represent various radicals; their use as medicaments and pharmaceutical compositions containing them. These compounds are particularly useful for the treatment of cancer.

This invention relates to methods and installations for producing ultra pure sodium chloride salt crystals primarily for use in saturating depleted brine resulting from the electrolytic decomposition of saturated brine in chlor alkali membrane cells for the production of chlorine, caustic soda and hydrogen. More particularly, this invention relates to the production of ultra pure sodium chloride salt crystals by processing primary treated brine by first acidifying the primary treated brine, then...

Pure DHA and pure EPA can be obtained from a mixture of EPA and DHA in a solution by forming salts of DHA and EPA which have different solubilities in the solvent, cooling the solution until the salt of EPA is formed, filtering the solution to recover the salt of EPA, and acidifying the EPA salt and the DHA salt to obtain pure EPA and pure DHA.

Process for recovery of highly pure acrylonitrile by quickly vaporizing under vacuum the contaminated acrylonitrile as well as fresh acrylonitrile followed by contacting with hydrophilic agents in an extractive distillation column using plural number of packed sections.

The present invention relates to an improved process for the preparation of pure Finasteride of Formula I, ##STR00001## which comprises converting dihydrofinasteride to finasteride through novel protected dihydrofinasteride and protected finasteride intermediates.