Patents by Inventor Dragan Mejic

Dragan Mejic 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: 8375851
    Abstract: The present invention provides an apparatus for loading soft materials and methods for using the same. In some embodiments, the apparatus is a gearless mechanical loading apparatus which converts a rotational movement of one end of a first element into an arc of a circle movement of the other end of the first element; and converts the arc of a circle movement of the other end of the first element into a precision two-dimensional lateral movement of a second element.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: February 19, 2013
    Assignee: The Regents of University of Colorado
    Inventors: Stephanie Bryant, Garret Nicodemus, Idalis Villanueva, Dana S. Hauschulz, Dragan Mejic
  • Patent number: 8287610
    Abstract: Methods for carrying out high temperature reactions such as biomass pyrolysis or gasification using solar energy. The biomass particles are rapidly heated in a solar thermal entrainment reactor. The residence time of the particles in the reactor can be 5 seconds or less. The biomass particles may be directly or indirectly heated depending on the reactor design. Metal oxide particles can be fed into the reactor concurrently with the biomass particles, allowing carbothermic reduction of the metal oxide particles by biomass pyrolysis products. The reduced metal oxide particles can be reacted with steam to produce hydrogen in a subsequent process step.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: October 16, 2012
    Assignee: The Regents of the University of Colorado, a body corporate
    Inventors: Alan W. Weimer, Christopher Perkins, Dragan Mejic, Paul Lichty
  • Publication number: 20100144007
    Abstract: The present invention provides an apparatus for loading soft materials and methods for using the same. In some embodiments, the apparatus is a gearless mechanical loading apparatus which converts a rotational movement of one end of a first element into an arc of a circle movement of the other end of the first element; and converts the arc of a circle movement of the other end of the first element into a precision two-dimensional lateral movement of a second element.
    Type: Application
    Filed: November 10, 2009
    Publication date: June 10, 2010
    Applicant: The Regents of the University of Colorado, a body corporate
    Inventors: Stephanie Bryant, Garret Nicodemus, Idalis Villanueva, Dana S. Hauschulz, Dragan Mejic
  • Publication number: 20080086946
    Abstract: Methods for carrying out high temperature reactions such as biomass pyrolysis or gasification using solar energy. The biomass particles are rapidly heated in a solar thermal entrainment reactor. The residence time of the particles in the reactor can be 5 seconds or less. The biomass particles may be directly or indirectly heated depending on the reactor design. Metal oxide particles can be fed into the reactor concurrently with the biomass particles, allowing carbothermic reduction of the metal oxide particles by biomass pyrolysis products. The reduced metal oxide particles can be reacted with steam to produce hydrogen in a subsequent process step.
    Type: Application
    Filed: August 29, 2007
    Publication date: April 17, 2008
    Inventors: Alan Weimer, Christopher Perkins, Dragan Mejic, Paul Lichty
  • Patent number: RE45317
    Abstract: Methods for carrying out high temperature reactions such as biomass pyrolysis or gasification using solar energy. The biomass particles are rapidly heated in a solar thermal entrainment reactor. The residence time of the particles in the reactor can be 5 seconds or less. The biomass particles may be directly or indirectly heated depending on the reactor design. Metal oxide particles can be fed into the reactor concurrently with the biomass particles, allowing carbothermic reduction of the metal oxide particles by biomass pyrolysis products. The reduced metal oxide particles can be reacted with steam to produce hydrogen in a subsequent process step.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: January 6, 2015
    Assignee: The Regents of the University of Colorado
    Inventors: Alan W. Weimer, Christopher Perkins, Dragan Mejic, Paul Lichty