Patents by Inventor N. Senthilkumar

N. Senthilkumar 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: 12030787
    Abstract: The present invention generally relates to a process for synthesizing rare earth-doped cobalt-chromite (CoCr2-xRxO4) pigments for capacitive and resistive humidity sensor applications, the process includes of crushing individually metal nitrates and rare earth material (R) using a hydraulic press to form a powder of metal nitrates and rare earth nitrates; dissolving the powder of metal nitrates and rare earth material (R) with fuels in 30 milliliters of distilled water with constant stirring using a magnetic stirrer to form a green color solution; heating the green color solution at 425 degrees Celsius for half an hour to obtain a green powder; extracting and grinding the green powder in an agate mortar for 1 hour to form a fine green pigment; and annealing the fine green pigment in a muffle furnace for two hours at a temperature of 500-600 degrees to remove organic residue and obtain rare earth-doped cobalt-chromite (CoCr2-xRxO4) pigments.
    Type: Grant
    Filed: April 28, 2023
    Date of Patent: July 9, 2024
    Assignees: Princess Nourah bint Abdurahman University
    Inventors: Mohd. Shkir, Thamraa Alshahrani, Anuj Kumar, S. AlFaify, Mohd Ubaidullah, N. Senthilkumar, Jagadeesha Angadi. V
  • Publication number: 20230357047
    Abstract: The present invention generally relates to a process for synthesizing rare earth-doped cobalt-chromite (CoCr2-xRxO4) pigments for capacitive and resistive humidity sensor applications, the process includes of crushing individually metal nitrates and rare earth material (R) using a hydraulic press to form a powder of metal nitrates and rare earth nitrates; dissolving the powder of metal nitrates and rare earth material (R) with fuels in 30 milliliters of distilled water with constant stirring using a magnetic stirrer to form a green color solution; heating the green color solution at 425 degrees Celsius for half an hour to obtain a green powder; extracting and grinding the green powder in an agate mortar for 1 hour to form a fine green pigment; and annealing the fine green pigment in a muffle furnace for two hours at a temperature of 500-600 degrees to remove organic residue and obtain rare earth-doped cobalt-chromite (CoCr2-xRxO4) pigments.
    Type: Application
    Filed: April 28, 2023
    Publication date: November 9, 2023
    Inventors: Mohd. Shkir, Thamraa Alshahrani, Anuj Kumar, S. AlFaify, Mohd Ubaidullah, N. Senthilkumar, Jagadeesha Angadi.V