Patents by Inventor Tonkeswar DAS

Tonkeswar DAS 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).

  • Publication number: 20240002236
    Abstract: The present invention relates to a method for fabrication of blue-fluorescent and non-toxic nanodiamonds from atmospheric particulate matters including total solid suspended particulate matter (TSPM) and particulate matter with size less than 10? (PM10). Mostly, the present invention provides an efficient mitigation process for particulate pollutant by conversion of these pollutants (PM and TSPM) into non-toxic high-value product such as nanodiamond by using the ultrasonic-assisted chemical oxidation method. This method is environmental friendly, simple, and biocompatible for the production of nanodiamonds from such atmospheric particulate matter.
    Type: Application
    Filed: November 27, 2020
    Publication date: January 4, 2024
    Inventors: Binoy K. SAIKIA, Nazrul ISLAM, Tonkeswar DAS, Jatin KALITA
  • Publication number: 20210292172
    Abstract: The present invention relates to a method for fabrication of blue-fluorescent and non-toxic nanodiamonds from atmospheric particulate matters including total solid suspended particulate matter (TSPM) and particulate matter with size less than 10? (PM10). Mostly, the present invention provides an efficient mitigation process for particulate pollutant by conversion of these pollutants (PM and TSPM) into non-toxic high-value product such as nanodiamond by using the ultrasonic-assisted chemical oxidation method. This method is environmental friendly, simple, and biocompatible for the production of nanodiamonds from such atmospheric particulate matter.
    Type: Application
    Filed: March 17, 2021
    Publication date: September 23, 2021
    Inventors: Binoy K. SAIKIA, Nazrul ISLAM, Tonkeswar DAS, Jatin KALITA
  • Patent number: 10655061
    Abstract: The present invention relates to a process for the preparation of blue-fluorescence emitting carbon dots (CDTs) from sub-bituminous tertiary high sulfur Indian coals. More particularly, the present invention relates to the production of characteristics carbon dots from low-quality Indian coals by an ultrasonic-assisted wet-chemical method. Also, the present invention provides a simple and environmentally benign method for fabrication of characteristics and size-controlled carbon dots.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: May 19, 2020
    Assignee: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Binoy Kumar Saikia, Tonkeswar Das, Sonali Roy, Bardwi Narzary, Hari Prasanna Dekaboruah, Manobjyoti Bordoloi, Jiumoni Lahkar, Dipankar Neog, Danaboyina Ramaiah
  • Publication number: 20180251678
    Abstract: The present invention relates to a process for the preparation of blue-fluorescence emitting carbon dots (CDTs) from sub-bituminous tertiary high sulfur Indian coals. More particularly, the present invention relates to the production of characteristics carbon dots from low-quality Indian coals by an ultrasonic-assisted wet-chemical method. Also, the present invention provides a simple and environmentally benign method for fabrication of characteristics and size-controlled carbon dots.
    Type: Application
    Filed: September 14, 2017
    Publication date: September 6, 2018
    Inventors: Binoy Kumar SAIKIA, Tonkeswar DAS, Sonali ROY, Bardwi NARZARY, Hari Prasanna DEKABORUAH, Manobjyoti BORDOLOI, Jiumoni LAHKAR, Dipankar NEOG, Danaboyina RAMAIAH