Patents by Inventor Dhrubojyoti Dey Laskar

Dhrubojyoti Dey Laskar 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).

  • Apparatus and process for preparing reactive lignin with high yield from plant biomass for production of fuels and chemicals
    Patent number: 9518076
    Abstract: Provided are methods for aqueous isolation of depolymerized lignin in high yield from a lignin-containing biomass composition, comprising positioning a lignin-containing biomass composition into a flowthrough thermal reactor chamber to provide for passage of an aqueous fluid therethrough, contacting the lignin biomass composition with the aqueous fluid under elevated temperature conditions sufficient to provide for lignin release and depolymerization, flowing the aqueous fluid through the reactor chamber under the elevated temperature conditions, to provide an output aqueous fluid comprising released depolymerized lignin, and collecting the depolymerized lignin.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: December 13, 2016
    Assignee: Washington State University
    Inventors: Bin Yang, Dhrubojyoti Dey Laskar
  • Lignin Derivatives
    Publication number: 20160229879
    Abstract: The present invention provides lignin derivatives having a certain physical and/or chemical properties. In particular, the lignin derivatives of the invention have particular NMR spectral characteristics, impurity content, average molecular weight, and/or other characteristics.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 11, 2016
    Applicant: PUREVISION TECHNOLOGY, LLC
    Inventors: Dhrubojyoti Dey Laskar, John Allen Yegge, Andrew Stephen Boswell, Sara Jordan Chmelka, Leslie W. Joy, Ryan Carl Allen Tarrant, David Cole DeCoster, Richard C. Wingerson, Edwin R. Lehrburger
  • APPARATUS AND PROCESS FOR PREPARING REACTIVE LIGNIN WITH HIGH YIELD FROM PLANT BIOMASS FOR PRODUCTION OF FUELS AND CHEMICALS
    Publication number: 20150099868
    Abstract: Provided are methods for aqueous isolation of depolymerized lignin in high yield from a lignin-containing biomass composition, comprising positioning a lignin-containing biomass composition into a flowthrough thermal reactor chamber to provide for passage of an aqueous fluid therethrough, contacting the lignin biomass composition with the aqueous fluid under elevated temperature conditions sufficient to provide for lignin release and depolymerization, flowing the aqueous fluid through the reactor chamber under the elevated temperature conditions, to provide an output aqueous fluid comprising released depolymerized lignin, and collecting the depolymerized lignin.
    Type: Application
    Filed: April 30, 2013
    Publication date: April 9, 2015
    Applicant: Washington State University
    Inventors: Bin Yang, Dhrubojyoti Dey Laskar