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Gas-Driven Microturbine

Description: The present invention is directed to a means of fabricating a gas-driven microturbine that is capable of providing autonomous propulsion in which the rapidly moving gases are directed through a micromachined turbine to power mechanical, electrical, or electromechanical devices by direct mechanical linkage of turbo-electric generator components in a domain ranging from tenths of micrometers to thousands of micrometers. By optimally selecting monopropellants or bipropellants to be the fuel set, a more efficient gas-driven microturbine can be realized from the increased mass flow rate of the gas stream due to the higher combustion reaction energies of these fuel sets. Additionally, compressed gas can be utilized to provide a high-flow gas stream for the gas-driven microturbine. The present invention is adaptable to many defense and non-defense applications, including the provision of mechanical power for miniature devices such as fans, geared mechanisms, mechanical linkages, actuators, bio-medical procedures, manufacturing, industrial, aviation, computers, safety systems, and electrical generators.
Date: July 14, 1999
Creator: Sniegowski, Jeffrey J.; Rodgers, Murray S.; McWhorter, Paul J.; Aeschliman, Daniel P. & Miller, William M.
Partner: UNT Libraries Government Documents Department

Process for Making a Ceramic Composition for Immobilization of Actinides

Description: Disclosed is a process for making a ceramic composition for the immobilization of actinides, particularly uranium and plutonium. The ceramic is a titanate material comprising pyrochlore, brannerite and rutile. The process comprises oxidizing the actinides, milling the oxides to a powder, blending them with ceramic precursors, cold pressing the blend and sintering the pressed material.
Date: June 22, 1999
Creator: Ebbinghaus, Bartley B.; Van Konynenburg, Richard A.; Vance, Eric R.; Stewart, Martin W.; Walls, Philip A.; Brummond, William Allen et al.
Partner: UNT Libraries Government Documents Department

Process for Removing Cadmium From Scrap Metal

Description: A process for the recovery of a metal, in particular, cadmium contained in scrap, in a stable form. The process comprises the steps of mixing the cadmium-containing scrap with an ammonium carbonate solution, preferably at least a stoichiometric amount of ammonium carbonate, and/or free ammonia, and an oxidizing agent to form a first mixture so that the cadmium will react with the ammonium carbonate to form a water-soluble ammine complex; evaporating the first mixture so that ammine complex dissociates from the first mixture leaving carbonate ions to react with the cadmium and form a second mixture that includes cadmium carbonate; optionally adding water to the second mixture to form a third mixture; adjusting the pH of the third mixture to the acid range whereby the cadmium carbonate will dissolve; and adding at least a stoichiometric amount of sulfide, preferably in the form of hydrogen sulfide or an aqueous ammonium sulfide solution, to the third mixture to precipitate cadmium sulfide. This mixture of sulfide is then preferably digested by heating to facilitate precipitation of large particles of cadmium sulfide. The scrap may be divided by shredding or breaking up to exposure additional surface area. Finally, the precipitated cadmium sulfide can be mixed with glass formers and vitrified for permanent disposal.
Date: January 1, 1994
Creator: Kronberg, James W.
Partner: UNT Libraries Government Documents Department

Impact Resistant Flexible Body Device

Description: Patent relating to an impact resistant device that can be worn as body armor to protect the wearer from high velocity projectiles.
Date: August 13, 2008
Creator: Biermann, Paul J.; Roberts, Jack C. & Reidy, Richard F.
Partner: UNT College of Engineering

Method of Enhancing Quality Factors in Cotton

Description: Patent relating to a method of enhancing quality factors in cotton.
Date: June 9, 2006
Creator: Hake, Kater Davis; Chapman, Kent D.; Kerby, Thomas Arthur & Speed, Thomas Rainey
Partner: UNT College of Arts and Sciences

Conductor Structures Including Penetrable Materials

Description: Patent relating to conductors used in electronic components and related fabrication methods, and more particularly to metal conductors for use in electronic components created by deposition of metals and related fabrication methods.
Date: February 24, 2004
Creator: Kelber, Jeffry A.; Lei, Jipu; Magtoto, Noel P. & Rudenja, Sergei
Partner: UNT College of Arts and Sciences

Synthesis, Uses and Compositions of Crystal Hydrogels

Description: Patent relating to the synthesis, uses and compositions of crystal hydrogels.
Date: November 15, 2002
Creator: Hu, Zhibing; Lu, Xihua; Gao, Jun; Cai, Tong; Huang, Gang & Zhou, Bo
Partner: UNT College of Arts and Sciences

Plant Fatty Acid Amide Hydrolases

Description: Patent relating to plant fatty acid amide hydrolases (FAAH) coding sequences.
Date: January 8, 2008
Creator: Chapman, Kent D.; Shrestha, Rhidaya; Blancaflor, Elison B. & Dixon, R. A.
Partner: UNT College of Arts and Sciences