Now showing items 1-20 of 1194

    • Materials and methods for enhanced photocatalyzation of organic compounds with palladium 

      Adam Heller; Heinz Gerischer (United States Patent and Trademark Office, 1993-03-16)
      NULL
    • Synchronization circuit for parallel processing 

      G. Jack Lipovski (United States Patent and Trademark Office, 1993-03-09)
      An apparatus and method for synchronizing parallel processors utilizing a lookahead synchronization circuit is provided by the present invention. A five gate logic circuit is formed as a cell and this cell can serve as a ...
    • Method and apparatus for spinning projectiles fired from a rail gun 

      William F. Weldon (United States Patent and Trademark Office, 1993-02-23)
      A method and apparatus for imparting a spin to a projectile fired from a railgun. A projectile which is rotatable within the barrel of the railgun, and which includes a conductive element, is caused to pass through a ...
    • Method and apparatus for improving performance of AC machines 

      John S. Hsu; Herbert H. Woodson (United States Patent and Trademark Office, 1993-02-23)
      A method and apparatus for improving the performance of polyphase AC machines. The polyphase AC machines are excited both with a fundamental frequency and with an odd harmonic of the fundamental frequency. The fundamental ...
    • Method and construction for control of current distribution in railgun armatures 

      William F. Weldon; Herbert H. Woodson; Glen C. Long (United States Patent and Trademark Office, 1993-02-02)
      An electromagnetic railgun having a layer of low conductivity material along the rails to interface with the armature as the armature is propelled along the rails. The low conductivity material has been found to permit ...
    • Method of producing parts by selective beam interaction of powder with gas phase reactant 

      Harris L. Marcus; David L. Bourell; Udaykumar Lakshminarayan (United States Patent and Trademark Office, 1993-01-26)
      A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto each ...
    • Process for preparing expanded porphyrins: large porphyrin-like tripyrroledimethine-derived macrocycles 

      Toshiaki Murai; Jonathan L. Sessler; Gregory W. Hemmi (United States Patent and Trademark Office, 1992-11-10)
      " The present invention involves a novel tripyrrole dimethine-derived ""expanded porphyrin"" (texaphyrin), the synthesis of such compounds, their analogs or derivatives and their uses. These expanded porphyrin-like macrocycles ...
    • Catalyst and plasma assisted nucleation and renucleation of gas phase selective laser deposition 

      Harris L. Marcus; Guisheng Zong; W. Richards Thissell (United States Patent and Trademark Office, 1992-12-08)
      A method and apparatus for selectively depositing a layer of material from a gas phase to produce a part comprising a plurality of deposited layers. The apparatus includes a computer controlling a directed energy beam, ...
    • Sublimating and cracking apparatus 

      Ben G. Streetman; Terry J. Mattord; Craig W. Farley (United States Patent and Trademark Office, 1992-10-20)
      A sublimating and cracking device which may be used to produce a collimated beam of molecules from a solid source. The device includes an elongated sublimating tube and an elongated cracking tube adapted to be axially ...
    • Sapphyrins, derivatives and syntheses 

      Jonathan L. Sessler; Michael John Cyr (United States Patent and Trademark Office, 1992-10-27)
      The present invention involves, in addition to many unique substituted sapphyrins, a novel method for synthesizing sapphyrins with good efficiency and high yield. An improved 9-step synthesis of substituted sapphyrins, ...
    • Selective laser sintering of parts by compound formation of precursor powders 

      Harris L. Marcus; David L. Bourell; Wendy L. Weiss (United States Patent and Trademark Office, 1992-10-20)
      A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the ...
    • Current limiting device for overcurrent protection 

      William F. Weldon; Herbert H. Woodson (United States Patent and Trademark Office, 1983-09-20)
      A current limiting device for use with a circuit breaker in an electric power system utilizes mutual inductance variation between movable windings to limit current to safe levels. In the device, first and second coil ...
    • Method of producing parts and molds using composite ceramic powders 

      Harris L. Marcus; Udaykumar Lakshminarayan (United States Patent and Trademark Office, 1992-09-15)
      A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the ...
    • Railguns with current guard plates 

      William F. Weldon; Joseph H. Beno (United States Patent and Trademark Office, 1992-08-18)
      An electromagnetic projectile launcher or railgun capable of withstanding hundreds or thousands of shots. The railgun features a current management system having guard plates which act to reduce peak rail current densities ...
    • Chemoprevention of electrophilic damage by mercaptopurine analogs 

      Michael C. MacLeod (United States Patent and Trademark Office, 1992-06-09)
      Analogs of 6-mercaptopurine have been found to enhance the detoxification of various electrophilic toxicants in vivo, while having minimal cytotoxicity themselves. This property allows such compounds to act as scavengers ...
    • High calcium chemically defined culture medium 

      Rebecca J. Morris; Susan M. Fischer; Thomas J. Slaga (United States Patent and Trademark Office, 1992-06-30)
      A high calcium chemically defined animal cell culture medium including vitamins A and D and a fatty acid or its ester. The medium is particularly adapted for the primary or secondary culture of epithelial cells. However, ...
    • Photodynamic activity of sapphyrins 

      Anthony M. Harriman; Jonathan L. Sessler; Bhaskar G. Maiya (United States Patent and Trademark Office, 1992-06-09)
      The present invention includes a method to produce singlet oxygen from molecular oxygen generated by reaction with a sapphyrin compound excited at an absorbing wavelength to form a triplet species. Specifically, the sapphyrin ...
    • Techniques for detecting insect contamination of foodstuffs 

      Wendell E. Burkholder; G. Barrie Kitto; Frank A. Quinn (United States Patent and Trademark Office, 1992-06-02)
      The present invention involves approaches to the detection of insect contamination of foodstuffs such as grain, for example. These approaches involve the detection of biological substances characteristic of insects. One ...
    • Sublimating and cracking apparatus 

      Ben G. Streetman; Terry J. Mattord; Dean P. Neikirk (United States Patent and Trademark Office, 1992-01-14)
      A furnace having a sublimating section, a cracking section oriented off axis to the sublimating section, and a valve for controlling flux between the sections. The valve includes an annular plug having at least one ...
    • Processes for removing acid components from gas streams 

      Gary T. Rochelle; John C. S. Chang; Charles B. Sedman; Theodore G. Brna; Claus Jorgensen (United States Patent and Trademark Office, 1992-03-31)
      The present disclosure relates to improved processes for treating acid gases to remove acid gas components therefrom. Processes in accordance with the present invention include preparing a calcium silicate hydrate sorbent ...