Patents by Inventor Orlin Velev

Orlin Velev 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).

  • Droplet transportation devices and methods having a fluid surface
    Patent number: 7547380
    Abstract: Devices for the manipulation of a suspended particle in an electric field gradient include a plurality of electrically isolated electrodes on a surface. A liquid composition is on the plurality of electrodes. The liquid composition covers the surface continuously between adjacent ones of the plurality of electrodes. The liquid composition has an exposed liquid surface for suspending a particle. The plurality of electrodes are configured to provide an electric field gradient for transporting the particle suspended in said liquid composition.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: June 16, 2009
    Assignee: North Carolina State University
    Inventor: Orlin Velev
  • Process for preparing microrods using liquid-liquid dispersion
    Publication number: 20060063882
    Abstract: The invention provides a method for forming polymer microrods, the method including the steps of providing a polymer solution comprising a polymer dissolved in a first solvent; providing a dispersion medium comprising a second solvent, wherein the first solvent and the second solvent are miscible or partially soluble in each other, and wherein the polymer is insoluble in the second solvent; adding the polymer solution to the dispersion medium to form a dispersed phase of polymer solution droplets within the dispersion medium; and introducing a shear stress to the dispersion medium and dispersed polymer solution droplets for a time and at a shear rate sufficient to elongate the polymer solution droplets to form microrods and solidify the microrods by attrition of the polymer solvent into the dispersion medium.
    Type: Application
    Filed: June 15, 2005
    Publication date: March 23, 2006
    Inventors: Orlin Velev, Rossitza Alargova
  • Droplet transportation devices and methods having a fluid surface
    Publication number: 20040211659
    Abstract: Devices for the manipulation of a suspended particle in an electric field gradient include a plurality of electrically isolated electrodes on a surface. A liquid composition is on the plurality of electrodes. The liquid composition covers the surface continuously between adjacent ones of the plurality of electrodes. The liquid composition has an exposed liquid surface for suspending a particle. The plurality of electrodes are configured to provide an electric field gradient for transporting the particle suspended in said liquid composition.
    Type: Application
    Filed: January 12, 2004
    Publication date: October 28, 2004
    Inventor: Orlin Velev