Patents by Inventor Debasish Chakraborty

Debasish Chakraborty 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: 10005067
    Abstract: The invention contributes to a cost effective way to solve the problem of trace ammonia removal from a hydrogen and nitrogen containing gas. The set of catalysts of the invention selectively oxidized ammonia in ppm concentration even in gas mixtures containing hydrogen gas in concentrations of three orders of magnitude higher than the concentration of ammonia.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: June 26, 2018
    Assignee: Danmarks Tekniske Universitet
    Inventors: Debasish Chakraborty, Ib Chorkendorff, Jakob Lind Olsen, Hugo José Lopes Silva, Morten Godtfred Nielsen
  • Patent number: 9878309
    Abstract: The present invention relates to a bimetallic catalyst for ammonia oxidation, a method for producing a bimetallic catalyst for ammonia oxidation and a method for tuning the catalytic activity of a transition metal. By depositing an overlayer of less catalytic active metal onto a more catalytic active metal, the total catalytic activity is enhanced.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: January 30, 2018
    Assignee: Danmarks Tekniske Universitet
    Inventors: Christian Nagstrup Conradsen, Sine Ellemann Olesen, Debasish Chakraborty, Ib Chorkendorff
  • Publication number: 20170157593
    Abstract: The invention contributes to a cost effective way to solve the problem of trace ammonia removal from a hydrogen and nitrogen containing gas. The set of catalysts of the invention selectively oxidised ammonia in ppm concentration even in gas mixtures containing hydrogen gas in concentrations of three orders of magnitude higher than the concentration of ammonia.
    Type: Application
    Filed: May 26, 2015
    Publication date: June 8, 2017
    Inventors: Ib Chorkendorff, Debasish Chakraborty, Jakob Lind Olsen, Hugo José Lopes Silva, Morten Godtfred Nielsen
  • Publication number: 20170001177
    Abstract: The present invention relates to a bimetallic catalyst for ammonia oxidation, a method for producing a bimetallic catalyst for ammonia oxidation and a method for tuning the catalytic activity of a transition metal. By depositing an overlayer of less catalytic active metal onto a more catalytic active metal, the total catalytic activity is enhanced.
    Type: Application
    Filed: October 30, 2014
    Publication date: January 5, 2017
    Inventors: Christian Nagstrup Conradsen, Sine Ellemann Olesen, Debasish Chakraborty, Ib Chorkendorff
  • Patent number: 9499402
    Abstract: In a method of preparing a ruthenium-containing catalyst on a non-conductive metal oxide support comprises dissolving one or more ruthenium precursor compounds in an liquid organic polyol, combining the thus obtained solution with (a) nano-powder(s) of one or more metal oxides in a ratio of moles metal oxide(s) to moles ruthenium atoms in the one or more ruthenium precursor compounds of about 0:1 to about 6:1, the metal oxide nano-powder(s) having a surface area of from about 5 to about 300 m2/g and a point of zero charge (PZC) of pH 5.5 or higher, agitating the thus obtained mixture, adding pre-shaped alumina support pellets to the agitated mixture, which is than heated at a temperature of about 50° C.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: November 22, 2016
    Assignee: Elbit Systems Land and C4I Ltd.
    Inventor: Debasish Chakraborty
  • Publication number: 20140322622
    Abstract: In a method of preparing a ruthenium-containing catalyst on a non-conductive metal oxide support comprises dissolving one or more ruthenium precursor compounds in an liquid organic polyol, combining the thus obtained solution with (a) nano-powder(s) of one or more metal oxides in a ratio of moles metal oxide(s) to moles ruthenium atoms in the one or more ruthenium precursor compounds of about 0:1 to about 6:1, the metal oxide nano-powder(s) having a surface area of from about 5 to about 300m2/g and a point of zero charge (PZC) of pH 5.5 or higher, agitating the thus obtained mixture, adding pre-shaped alumina sup port pellets to the agitated mixture, which is than heated at a temperature of about 50° C.
    Type: Application
    Filed: May 15, 2012
    Publication date: October 30, 2014
    Applicant: CELLERA, INC.
    Inventor: Debasish Chakraborty
  • Publication number: 20100083358
    Abstract: Disclosed herein is a computer implemented method and system that securely aggregates and manages user related data in an online environment while maintaining privacy of a user. The user provides access credentials at a client device for each of multiple data sources. The access credentials are transformed to an unreadable format at the client device using a public key transmitted by a web server. The transformed access credentials in the unreadable format are stored locally on the client device. A communicating software agent on the client device communicates the stored access credentials to the web server. The web server transforms the communicated access credentials to a readable format using a private key and retrieves the user related data by accessing the data sources using the access credentials in the readable format. The web server presents the retrieved user related data to the user in one or more presentation modes.
    Type: Application
    Filed: January 12, 2009
    Publication date: April 1, 2010
    Inventors: Velamur Rangachari Govindarajan, Debasish Chakraborty, Kunnath Santhosh