Patents by Inventor Ashiwani K. Gupta

Ashiwani K. Gupta 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).

  • Blended frother for producing low ash content clean coal through flotation
    Patent number: 8469197
    Abstract: An improved frothing agent adaptable to froth flotation process to enhance coal selectivity for separation and efficiency of the froth flotation process comprises: A blended mixture of Ketone (2,6-Dimethyl-4-Heptanone) 85-89% (Wt %) Ester molecule(Tetrahydrofurfuryl acetate) 10-12% (Wt %) Epoxide conditioner (1,2-Epoxydodecane) 0.25-0.30% (Wt %) Water 4.75-5.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: June 25, 2013
    Assignee: Tata Steel Limited
    Inventors: Ashiwani K. Gupta, Pradip Kumar Banerjee, Debashish Bhattacharjee