These United States Patents were originally assigned to Virginia Tech.

Recent Submissions

  • Corrosion inhibiting repair and rehabilitation treatment process for reinforced concrete structures 

    Virginia Tech Intellectual Properties, Inc.; Weyers, Richard E.; Prowell, Brian D. (United States Patent and Trademark Office, 1995-06-27)
    A repair and rehabilitation treatment process for reinforced concrete structures involves the removal of concrete from above rebar or other metal reinforcement material in the concrete structure. After removal of concrete, ...
  • Metalorganic chemical vapor deposition of ferroelectric thin films 

    Ceraboma, Inc.; Virginia Polytechnic Institute and State University; Sharp Kabushiki Kaisha; Desu, Seshu B.; Peng, Chia-Tien Shian (United States Patent and Trademark Office, 1995-07-11)
    A method to produce high quality doped and undoped lead zirconate titanate (PZT) thin films by metalorganic chemical vapor deposition is disclosed. The PZT thin films with the perovskite structure were deposited on sapphire ...
  • Methods of preparing polymeric ketones 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Pandya, Ashish (United States Patent and Trademark Office, 1995-08-15)
    A new method for preparing commercially valuable polymeric ketones is described. The method employs an .alpha.-amiononitrile as a monomeric unit whereby an amorphous, soluble polymer having protected carbonyl moiety is ...
  • Soft-switching PWM converters 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Hua, Guichao C. (United States Patent and Trademark Office, 1995-08-15)
    A full-bridge zero-voltage-switching pulse-width-modulated converter employs a saturable reactor in place of the linear inductor in order to reduce current stress on the active switches, reduce voltage stress on the rectifier ...
  • Method for preparing erythruronolactone 

    Virginia Polytechnic Institute and State University; Hudlicky, Tomas; Mandel, Martin (United States Patent and Trademark Office, 1995-08-15)
    There are described improved processes for the synthesis of a desired lactone useful as a synthon, the improved processes comprising oxidizing a protected arene diol with permanganate and periodate or subjecting a substituted ...
  • Apparatus for the separation of hydrophobic and hydrophilic particles using microbubble column flotation together with a process and apparatus for generation of microbubbles 

    Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Adel, Gregory T.; Luttrell, Gerald H. (United States Patent and Trademark Office, 1995-03-14)
    An apparatus is disclosed for the microbubble flotation separation of very fine and coarse particles, especially coal, and minerals so as to produce high purity and high recovery efficiency. This is accomplished through ...
  • Water soluble analogs and prodrugs of taxol 

    Virginia Tech Intellectual Properties, Inc.; Kingston, David G.; Liang, Jingyu (United States Patent and Trademark Office, 1995-05-02)
    Substituted 2'-benzoyl and 2', 7-dibenzoyl taxol derivatives are synthesized which have improved water solubility and stability while maintaining bioactivity. In a preferred embodiment, taxol 2',7-di(sodium 1,2-benzenedi ...
  • Aramid compositions of improved solubility and flame retardancy 

    Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; McGrath, James E.; Gungor, Attila; Delaviz, Yadollah (United States Patent and Trademark Office, 1995-05-30)
    Aramid polymers, e.g., those derived from p-phenylene diamine and terephthaloyl chloride, can have their solubility properties and flame retardancy enhanced by the incorporation therein of a moiety derived from a ...
  • Sol-gel .beta.-aluminum titanate thin film coating 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Brown, Nancy R.; Brown, Jr., Jesse J.; Sun, Tawei (United States Patent and Trademark Office, 1995-04-18)
    .beta.-Al.sub.2 TiO.sub.5 protective coatings have been developed for both dense and porous ceramics such as SiC and Si.sub.3 N.sub.4 using a chemical solution processing method involving the hydrolysis and condensation ...
  • Elastic-part immersion cell for analyzing microstructures in materials 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Anderson, Alan J. (United States Patent and Trademark Office, 1995-06-06)
    The elastic-port immersion cell (10) is an optical oil immersion vessel which has a flexible latex (or other) sheath (24) protruding from its sidewall. The sheath is affixed to an opening in the wall of the vessel using a ...
  • Resonant converters with secondary-side resonance 

    Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Liu, Kwang-Hwa (United States Patent and Trademark Office, 1988-11-15)
    A family of quasi-resonant converters is disclosed as comprising a voltage source, a transformer having primary and secondary windings, and a switch for periodically coupling the voltage source to the primary winding, ...
  • Reactive ion etching of lead zirconate titanate and ruthenium oxide thin films using CHClFCF.sub.3 or CHCl.sub.2 CF.sub.3 as an etch gas 

    Cedraeus Incorporated; Virginia Polytechnic Institute and State University; Sharp Kabushiki Kaisha; Desu, Seshu B.; Pan, Wei (United States Patent and Trademark Office, 1995-01-17)
    A method of reactive ion etching both a lead zirconate titanate ferroelectric dielectric and a RuO.sub.2 electrode, and a semiconductor device produced in accordance with such process. The dielectric and electrode are ...
  • Phosphorus containing poly(arylene ether)s useful as oxygen plasma resistant films and in nonlinear optical applications 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Priddy, Jr., Duane B.; Pickering, Timothy L.; McGrath, James E.; Smith, Carrington Duane (United States Patent and Trademark Office, 1995-02-07)
    Polymers containing the phosphine oxide moiety are identified as being particularly useful in applications where resistance to atomic oxygen etching is required and in applications where second order nonlinear optical ...
  • Video instrumentation for the analysis of mineral content in ores and coal 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Adel, Gregory T.; Luttrell, Gerald H. (United States Patent and Trademark Office, 1995-03-07)
    Mineral content in processed ore and coal content in coal slurries are determined using a video system. A video image is taken of a sample, the video image is digitized, and gray levels are assigned to points or areas on ...
  • Carbonate polymers containing ethenyl aryl moieties 

    The Dow Chemical Company; Virginia Polytechnic Institute and State University; Chamberlin, Thomas A.; Bales, Stephen E.; Mullins, Michael J.; McGrath, James E.; Marks, Maurice J.; Knauss, Daniel M. (United States Patent and Trademark Office, 1994-11-08)
    There are disclosed carbonate polymers having ethenyl aryl moieties. Such carbonate polymers are prepared from one or more multi-hydric compounds and have an average degree of polymerization of at least about 1 based on ...
  • Fully alkoxysilane-functionalized aliphatic polyamine compounds 

    Virginia Tech Intellectual Properties, Inc.; Wang, Bing; Wilkes, Garth L. (United States Patent and Trademark Office, 1994-12-06)
    Fully alkoxysilane-functionalized aliphatic polyamine compounds (e.g., fully functionalized dialkylenetriamine compounds) can be formed by reacting a dialkylenetriamine (e.g., diethylenetriamine) with a compound comprising ...
  • Trellis support system 

    Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Stiles, Herbert D. (United States Patent and Trademark Office, 1994-12-20)
    A trellis system which can be used with raspberry and other fruit production includes a plurality of structural units (36) which are essentially two dimensional in shape to allow for flat packing and shipping. Trellis wires ...
  • Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Burdisso, Ricardo A.; Fuller, Chris R.; O'Brien, Walter F.; Thomas, Russell H.; Dungan, Mary E. (United States Patent and Trademark Office, 1994-10-11)
    An active noise control system using a compact sound source is effective to reduce aircraft engine duct noise. The fan noise from a turbofan engine is controlled using an adaptive filtered-x LMS algorithm. Single multi ...
  • Fine powders of ketone-containing aromatic polymers and process of manufacture 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Lyon, Keith R.; Davis, Richey M.; Texier, Anne; Gungor, Atilla (United States Patent and Trademark Office, 1994-10-18)
    Fine particles of semi-crystalline ketone-containing aromatic polymers (PEEK, PEKK, etc.) are produced by controlling the rate and conditions of hydrolysis of an amorphous polyarylketimine intermediate. The choice of acid ...
  • Fused biconical taper fiber optic coupler station and fabrication techniques 

    Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Murphy, Kent A.; Claus, Richard O.; Gunther, Michael F. (United States Patent and Trademark Office, 1994-08-16)
    The fibers are bound together about 1 cm apart. An oxy-propane torch is used to heat the fibers so that they fuse together. At the same time, the two relatively movable translational stages to which the fibers are clamped ...

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