Now showing items 502-521 of 619

    • Seaweed supplement diet for enhancing immune response in mammals and poultry 

      Texas Tech University System; Virginia Tech Intellectual Properties, Inc.; Fontenot, Joseph P.; Allen, Vivien Gore; Pond, Kevin R.; Saker, Korinn E. (United States Patent and Trademark Office, 2002-01-29)
      Seaweed harvested from the ocean when ground as an intact meal or exposed to alkaline hydrolsis extraction procedure resulting in a water soluble form provides a feed ingredient with mineral composition and plant growth ...
    • Seaweed supplement diet for enhancing immune response in mammals and poultry 

      Texas Tech University System; Virginia Tech Intellectual Properties, Inc.; Fontenot, Joseph P.; Allen, Vivien Gore; Pond, Kevin R.; Saker, Korinn E. (United States Patent and Trademark Office, 2001-11-06)
      Seaweed supplement is included in diet of mammals and poultry to enhance immune response. In one embodiment, pasture forage is treated with seaweed supplement. When cattle or lambs are grazed on seaweed supplement treated ...
    • Segmented urea and siloxane copolymers and their preparation methods 

      Virginia Tech Intellectual Properties, Inc.; Yilgor, Iskender; Wilkes, Garth L.; Yilgor, Emel O.; Sheth, Jignesh P (United States Patent and Trademark Office, 2007-08-28)
      Using novel synthetic techniques, siloxane-urea segmented copolymers are made. The copolymers advantageously contain a polyether interface, with controlled morphologies and properties. High molecular weight, high strength ...
    • Self-calibrating optical fiber pressure, strain and temperature sensors 

      Virginia Tech Intellectual Properties, Inc.; Wang, Anbo (United States Patent and Trademark Office, 1999-10-05)
      Broadband energy incident on a transducer having partially or fully reflective surfaces separated by a gap which is greater than the coherence length of the broadband energy but smaller than one-half a coherence length of ...
    • Self-calibrating optical fiber pressure, strain and temperature sensors 

      Virginia Tech Intellectual Properties, Inc.; Zhao, Wei W.; Wang, Anbo; Wang, Jun; Xiao, Hai (United States Patent and Trademark Office, 2000-05-30)
      Broadband energy incident on a transducer having partially or fully reflective surfaces separated by a gap which is greater than the coherence length of the broadband energy but smaller than one-half a coherence length of ...
    • Self-compensating fiber optic flow sensor having an end of a fiber optics element and a reflective surface within a tube 

      Virginia Tech Intellectual Properties, Inc.; Wang, Anbo; Peng, Wei; Qi, Bing (United States Patent and Trademark Office, 2006-05-16)
      A flow rate fiber optic transducer is made self-compensating for both temperature and pressure by using preferably well-matched integral Fabry-Perot sensors symmetrically located around a cantilever-like structure. Common ...
    • Self-driven circuit for synchronous rectifier DC/DC converter 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Xu, Ming Gang; Ren, Yuancheng (United States Patent and Trademark Office, 2006-03-21)
      A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to ...
    • Self-driven circuit for synchronous rectifier DC/DC converter 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Xu, Ming Gang; Ren, Yuancheng (United States Patent and Trademark Office, 2004-11-16)
      A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to ...
    • Self-driven scheme for synchronous rectifier having no body diode 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Xu, Ming Gang; Zhou, Jinghai; Sun, Ju-Lu (United States Patent and Trademark Office, 2007-09-04)
      A voltage converter uses a component such as a JFET or four-terminal power MOSFET having no body diode and exhibiting no body diode conduction characteristic as a synchronous rectifier to reduce switching losses and body ...
    • Self-oscillating electronic discharge lamp ballast with dimming control 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Tao, Fengfeng (United States Patent and Trademark Office, 2004-02-24)
      A simplified electronic ballast for a discharge lamp which provides dimming by control of inverter frequency through modulation of magnetizing current in a transformer such that the switching frequency is made substantially ...
    • Semiconductor module arrangement 

      Virginia Tech Intellectual Properties, Inc.; DiMarino, Christina; Boroyevich, Dushan; Burgos, Rolando P.; Johnson, Mark (United States Patent and Trademark Office, 2018-07-24)
      In a switching module structure that includes a low-impedance path to ground, such as a parasitic capacitance of an insulating substrate, a further insulating substrate presenting a parasitic capacitance placed in series ...
    • Simple method of fabricating ferroelectric capacitors 

      Virginia Tech Intellectual Properties, Inc.; Sharp Kabushiki Kaisha; Desu, Seshu B.; Vijay, Dilip P.; Bhatt, Hemanshu D. (United States Patent and Trademark Office, 1998-09-15)
      A ferroelectric capacitor device and method of manufacture. A substrate supports a bottom electrode structure, with an adhesion/diffusion barrier layer sandwiched therebetween. The electrode layer includes a metal or metal ...
    • Single-stage input current shaping technique with voltage-doubler rectifier front-end 

      Virginia Tech Intellectual Properties, Inc.; Delta Electronics, Inc.; Lee, Fred C.; Jovanovic, Milan M.; Huber, Laszlo; Zhang, Jindong Henry (United States Patent and Trademark Office, 2000-11-14)
      A single-stage input-current-shaping (S.sup.2 ICS) converter of the present invention integrates a voltage-doubler-rectifier front-end with a DC/DC output stage. Two families of voltage-doubler S.sup.2 ICS converters are ...
    • Soft switched three-phase boost rectifiers and voltage source inverters 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Jiang, Yimin (United States Patent and Trademark Office, 1997-05-27)
      A boost rectifier is provided with an ultra high speed diode in its direct current rail to reduce diode reverse recovery loss with or without implementing a soft switching technique. Full zero-voltage-transition (ZVT) as ...
    • Soft-switched quasi-single-stage (QSS) bi-directional inverter/charger 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Wang, Kunrong (United States Patent and Trademark Office, 2001-12-11)
      A soft-switched single-phase quasi-single-stage (QSS) bi-directional inverter/charger converts AC-DC or DC-AC. The inverter/charger comprises a push-pull inverter/rectifier on the dc-side, an isolation transformer which ...
    • 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 ...
    • 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 ...
    • Solid-state DC circuit breaker 

      Virginia Tech Intellectual Properties, Inc.; Huang, Qin; Zhou, Xigen; Xu, Zhenxue (United States Patent and Trademark Office, 2005-10-04)
      A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection ...
    • Soybean phytase and nucleic acid encoding the same 

      Virginia Tech Intellectual Properties, Inc.; Grabau, Elizabeth A.; Hegeman, Carla (United States Patent and Trademark Office, 2001-10-16)
      Isolated soybean phytase polypeptides and isolated nucleic acids encoding soybean phytases are provided. The invention is also directed to nucleic acid expression constructs, vectors, and host cells comprising the isolated ...
    • Spatial, parallel-architecture robotic carpal wrist 

      Virginia Tech Intellectual Properties, Inc.; Reinholtz, Charles F.; Canfield, Stephen L.; Salerno, Robert J.; Ganino, Anthony J. (United States Patent and Trademark Office, 1997-12-23)
      A spatial parallel-architecture robotic Carpal wrist is shown. The structure of the robotic Carpal wrist allows for the application of a closed-form solution to the kinematic problem of determining all of the possible ...