Patents by Inventor Ryan P. Lu

Ryan P. Lu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8859950
    Abstract: Methods enable the capture and manipulation of minute particles. One method includes locating a particle on a specimen stage; generating a finite-length open-ended hollow tube laser output around the particle; generating opposing end-cap laser outputs at either end of the hollow tube laser output to enclose the particle; and moving at least one of the specimen stage, hollow tube laser output and end cap laser outputs to re-position the particle. Another method includes locating a particle on a specimen stage; generating a first finite-length open-ended hollow tube laser output around the particle; generating a second finite-length open-ended hollow tube laser output around the particle, whereby the particle becomes enclosed at the intersection of the first and second hollow tube laser outputs; and pivoting at least one of the first and second hollow tube laser outputs such that the particle is re-positioned.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: October 14, 2014
    Assignee: The United States of America as represented by Secretary of the Navy
    Inventors: Bienvenido Melvin L. Pascoguin, Ryan P. Lu, Ayax D. Ramirez
  • Publication number: 20130341500
    Abstract: Methods enable the capture and manipulation of minute particles. One method includes locating a particle on a specimen stage; generating a finite-length open-ended hollow tube laser output around the particle; generating opposing end-cap laser outputs at either end of the hollow tube laser output to enclose the particle; and moving at least one of the specimen stage, hollow tube laser output and end cap laser outputs to re-position the particle. Another method includes locating a particle on a specimen stage; generating a first finite-length open-ended hollow tube laser output around the particle; generating a second finite-length open-ended hollow tube laser output around the particle, whereby the particle becomes enclosed at the intersection of the first and second hollow tube laser outputs; and pivoting at least one of the first and second hollow tube laser outputs such that the particle is re-positioned.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 26, 2013
    Inventors: Bienvenido Melvin L. Pascoguin, Ryan P. Lu, Ayax D. Ramirez
  • Patent number: 8567403
    Abstract: A system includes an ultraviolet light source, such as light-emitting diodes, disposed between a first ionic grid and a second ionic grid. The first and the second ionic grids have opposite ionic charges and a plurality of silver nanoparticles disposed thereon. The ultraviolet light source is configured to emit, onto the first and the second ionic grids, ultraviolet radiation having a wavelength of between about 100 nm and about 280 nm. A biochemical detector may be located adjacent to the first ionic grid on a side of the first ionic grid opposite the ultraviolet light source. The ultraviolet light source, first ionic grid, and second ionic grid may be located within a housing connected to a gas mask, and a membrane filter may be disposed between the gas mask and housing. The housing may include a power source connected to the ultraviolet light source.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: October 29, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Christopher K. Huynh, Ayax D. Ramirez
  • Patent number: 8470285
    Abstract: A method of liquid phase synthesis of carbon nanotubes in air comprising the steps of making a first liquid phase metal salt catalyst solution of a first predetermined volume; making a carbon source liquid phase solution of a second predetermined volume; ultrasonicating the first metal salt catalyst and the carbon source solutions to de-agglomerate and uniformly disperse their powder form into the solutions; depositing predetermined volumes of droplets of the first metal salt catalyst and the carbon source solutions onto a substrate; drying the first metal salt catalyst and the carbon source solutions on the substrate in an air environment for a predetermined time to form a carbon and catalyst composite; and heating the carbon and catalyst mixture in the air environment for a predetermined temperature and time to form one or more carbon nanotubes.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: June 25, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Christopher K. Huynh, Ayax D. Rammirez, Debjyoti Banerjee
  • Patent number: 8437591
    Abstract: A system includes at least two optical fibers crossing to form a vertice. The optical fibers comprise a core, a cladding surrounding the core, and a conductive coating at least partially surrounding the length of the cladding. A portion of the core of each of the fibers is exposed proximate to the vertice. An optical microsphere whispering gallery mode (WGM) resonator is positioned to cover exposed core portion of each fiber and in contact with the conductive coating of each fiber. The optical fibers may be orthogonal to each other or offset by a non-orthogonal and non-zero angle. The WGM resonator may be positioned between each of the fibers. An optical energy source may be coupled to an end of the optical fibers, with an optical detector coupled to the other end. A voltage source may be connected to the conductive coating of each of the optical fibers.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 7, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Christopher K. Huynh, Ayax D. Ramirez, Joshua M. Kvavle
  • Patent number: 8210289
    Abstract: A microbot includes a spherical housing, first and second servomotors that are located internal to the housing and oriented horizontally and orthogonal to each other, and a plunger within the housing that selectively extends in the vertical direction. Castors are attached to each servomotor; and traction balls corresponding to each castor are placed so that each ball frictionally engages both a respective castor and the interior of the housing at the same time. As the servomotors rotate, the attached castors also rotate, which causes rotation of the traction balls and rolling of the housing, and results in translation of the microbot in the horizontal plane. As the plunger rapidly extends, it strikes the interior surface of the housing with sufficient force to cause a hopping motion of the microbot in the vertical direction.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: July 3, 2012
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Ayax D. Ramirez, Stephen D. Russell
  • Patent number: 8178429
    Abstract: Fabrication of a semiconductor structure is achieved by using a Dip Pen Nanolithography (DPN) tip to apply a metal catalyst to a prepared substrate. The catalyst is applied in a predetermined pattern, and crystal growth is established at the catalyst site.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: May 15, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Ayax D. Ramirez, Stephen D. Russell
  • Patent number: 7906401
    Abstract: A method of tuning threshold voltages of interdiffusible structures. The method includes a step of situating an interdiffusible structure in a path of a laser and a step of illuminating the interdiffusible structure with laser energy until a desired threshold voltage is obtained.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: March 15, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Ayax D. Ramirez, Bruce W. Offord, Stephen D. Russell
  • Patent number: 7700032
    Abstract: A laser ablation process is applied to a semiconductor substrate causing the semiconductor material surface and subsurface to be superheated to the point where material is ablated from the material substrate. Optional subsequent laser pulse(s) liquefy the particles, preferably while suspended in air, and the material surface tension causes the liquefied droplet of semiconductor material to form a sphere. The droplet preferably solidifies in air before reaching the substrate of its origin or another substrate for collection.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: April 20, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Ayax D. Ramirez, Ozzie Csanadi, Stephen D. Russell
  • Patent number: 7597717
    Abstract: A scanning probe microscopy head may include a base portion, cantilevers coupled to the base portion, and at least one tip coupled to each of the cantilevers. At least two of the cantilevers and associated tips may be configured to perform a different scanning probe microscopy technique. The cantilevers may be positioned perpendicular to the base portion and may be coupled to the perimeter of the base portion. The base portion may include circuitry coupled thereto for providing electricity to the tips. The cantilevers may each be placed into a recessed slot along the perimeter of the base and secured to the base by a securing mechanism, such as a spring clip. The cantilevers may be operatively coupled to a linear positioner, such as a piezoelectric motor, coupled to the perimeter of the base for controlling the amount of protrusion of the cantilevers from the perimeter of the base.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: October 6, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Stephen D. Russell, Ayax D. Ramirez
  • Patent number: 7153749
    Abstract: A method of tuning threshold voltages of interdiffusible structures. The method includes a step of situating a interdiffusible structure in a path of a laser and a step of illuminating the interdiffusible structure with laser energy until a desired threshold voltage is obtained.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: December 26, 2006
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Ryan P. Lu, Ayax D. Ramirez, Bruce W. Offord, Stephen D. Russell