Alcoa Inc.

Other

Charles Dobbs

John R Smith

Neal Richard Dando

Rajat S Ghosh

Peter Bowen

Roger Nichols

Richard R Lunt

Gregory Charles Kraft

Myra Bowen, Legal Representative

Horizontal gas-liquid scrubbing systems and associated gas scrubbing methodologies are provided. In one embodiment, a horizontal duct scrubbing system includes a horizontally disposed housing having a waste gas inlet and a treated gas outlet, a liquid inlet manifold disposed within the horizontally disposed housing, the liquid inlet manifold comprising a plurality of nozzles oriented to spray a scrubbing liquor co-current to the flow of a gas stream flowing through the horizontally disposed housing, and a demister located proximal the treated gas outlet, where the horizontally disposed housing is substantially free of flow deflection members between the liquid inlet manifold and the demister.

Systems and methods for removing gaseous pollutants from a gas stream

Horizontal gas-liquid scrubbing systems and associated gas scrubbing methodologies are provided. In one embodiment, a horizontal duct scrubbing system includes a horizontally disposed housing having a waste gas inlet and a treated gas outlet, a liquid inlet manifold disposed within the horizontally disposed housing, the liquid inlet manifold comprising a plurality of nozzles oriented to spray a scrubbing liquor co-current to the flow of a gas stream flowing through the horizontally disposed housing, and a demister located proximal the treated gas outlet, where the horizontally disposed housing is substantially free of flow deflection members between the liquid inlet manifold and the demister. The gas stream may include sulfur dioxide, and the system may be capable of removing at least 71 vol. % sulfur dioxide from the gas stream.

This dental casting apparatus includes a track, and a tray. The track has an inner and an outer track wall and a first and a second end portion which combine to define a chamber. A hardenable wet stone material is positionable within the chamber of the track. After the stone is allowed to harden within the track, a sharp knife cuts through the stone and the track to form a plurality of dies. The tray has an inner tray wall and outer tray wall which combine to define a recessed portion. The individual dies are positionable within the tray recessed portion, and are readily engageable and disengageable therefrom. The dental casting apparatus also includes a mechanism for securely retaining the dies to the tray in such a manner that each die can be individually removed from the tray without disengaging adjacent dies.

Dental casting apparatus and method

An apparatus for the preparation of a fixed bridge which includes a wax occlusal bar adapted to be positioned within a gap located between two abutments in a model of the patient's mouth and at least one removable wax pontic adapted to be carried on the occlusal bar. The wax pontic is movable and rotatable relative to the bar. The method of preparing a wax bridge employing this apparatus includes the following steps:

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Massena, NY, United States of America

Charles Dobbs