Patents by Inventor Sudhir Ramprasad

Sudhir Ramprasad 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).

  • Tungsten and vanadium separation
    Patent number: 10221467
    Abstract: Methods of isolating tungsten and, in particular, methods of separating tungsten and vanadium are described herein. The methods can generally comprise treating a tungsten-containing material in aqueous solution with a reducing agent suitable for the reduction of pentavalent vanadium to one or more lower oxidation states of vanadium, such that the tungsten can be more readily separated from the vanadium, e.g., via solvent extraction. In certain embodiments, the methods disclosed herein can provide tungsten, vanadium, or both tungsten and vanadium in sufficient purities for commercial use.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: March 5, 2019
    Assignee: CRISTAL USA INC.
    Inventors: Sudhir Ramprasad, Alexandre Fines
  • TUNGSTEN AND VANADIUM SEPARATION
    Publication number: 20180163283
    Abstract: Methods of isolating tungsten and, in particular, methods of separating tungsten and vanadium are described herein. The methods can generally comprise treating a tungsten-containing material in aqueous solution with a reducing agent suitable for the reduction of pentavalent vanadium to one or more lower oxidation states of vanadium, such that the tungsten can be more readily separated from the vanadium, e.g., via solvent extraction. In certain embodiments, the methods disclosed herein can provide tungsten, vanadium, or both tungsten and vanadium in sufficient purities for commercial use.
    Type: Application
    Filed: June 3, 2016
    Publication date: June 14, 2018
    Inventors: Sudhir Ramprasad, Alexandre Fines
  • Reaction chamber having pre-stored reagents
    Patent number: 8911938
    Abstract: Disclosed are preloaded analysis modules comprising reagents disposed within a barrier material capable of liberating the reagents, at a time advantageous to a reaction scheme, when exposed to certain activation conditions or reagents. Also disclosed are related methods for analyzing samples with such modules.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: December 16, 2014
    Assignee: The Trustees Of The University Of Pennsylvania
    Inventors: Michael G. Mauk, Haim H. Bau, Amanda W. Dyson, Sudhir Ramprasad, Dafeng Chen, Do Young Byun
  • METHOD OF MAKING A THIN FILM
    Publication number: 20130108780
    Abstract: A method of making a thin film is disclosed. A solution is dispensed on a substrate. The solution is spread into a thin layer with a hydrophilic material. The substrate or the hydrophilic material is moved relative to the other. In one embodiment, a thin film grows on the substrate by chemical reaction with the solution. In an alternative embodiment, the solution is evaporated, leaving behind a particulate film.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 2, 2013
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Sudhir Ramprasad, Daniel R. Palo
  • REACTION CHAMBER HAVING PRE-STORED REAGENTS
    Publication number: 20090226911
    Abstract: Disclosed are preloaded analysis modules comprising reagents disposed within a barrier material capable of liberating the reagents, at a time advantageous to a reaction scheme, when exposed to certain activation conditions or reagents. Also disclosed are related methods for analyzing samples with such modules.
    Type: Application
    Filed: December 10, 2008
    Publication date: September 10, 2009
    Applicant: The Trustees of the University of Pennsylvania
    Inventors: Michael G Mauk, Haim H. Bau, Amanda W. Dyson, Sudhir Ramprasad, Dafeng Chen, Do Young Byun