Patents by Inventor Jana S. Kesavan

Jana S. Kesavan 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: 11371916
    Abstract: An apparatus for passive sampling of airborne particles such as those found in an aerosol is disclosed. The passive sampler is designed to take advantage of natural air flow to collect airborne particles, such as those contained in an aerosol, for subsequent analysis. The passive sampler increases the sampling efficiency for diffusion and electrostatic collection of particles by using natural airflow or movement to bring particles closer to the deposition surface. Alternately charged electret filters further increase the sampling efficiency.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: June 28, 2022
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Jana S Kesavan, Nathan Kesavan, Jerold R Bottiger
  • Patent number: 11280490
    Abstract: A system and method for generating combustion aerosols from liquid fuel. The system includes a furnace with an inner heating tube having a heating tape wrapped thereabout. Further, the system includes a fuel line extending through an inlet end of the heating tube and into the heating tube, and a means for dripping the liquid fuel onto a plurality of different locations on an inner surface of the heating tube. The system further includes a power supply to power the heating tape to heat the inner heating tube to a temperature which can ignite the liquid fuel dripped onto the inner surface of the inner heating tube whereby there is an immediate combustion to form combustion products. Finally, the system includes an air line connected to the heating tube for directing compressed air through the inner heating tube to mix with the combustion products and transport the formed combustion aerosols out of an outlet end of the inner heating tube.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 22, 2022
    Assignee: The United States of America as Represented by The Secretary of the Army
    Inventors: Jerold R Bottiger, Jana S Kesavan, Deborah R Schepers
  • Patent number: 11137324
    Abstract: A collection plate for a cascade impactor is provided that includes: a container; an absorbent layer including a bottom surface and a top surface, the absorbent layer residing within the container, the absorbent layer further including a liquid medium within the absorbent layer; and an impaction membrane placed on the top surface of the absorbent layer, such that the impaction membrane is in fluidic communication with the absorbent layer. The absorbent layer is configured to hydrate the impaction membrane for at least four hours in a temperature of about 78° F. at 37% RH. The collection plate may be utilized as a component in a cascade impactor and/or in a method of collecting a biological sample with a cascade impactor.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: October 5, 2021
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Jana S Kesavan, Jerold R. Bottiger
  • Patent number: 10775279
    Abstract: An apparatus for passive sampling of airborne particles such as those found in an aerosol is disclosed. The passive sampler is designed to take advantage of natural air flow to collect airborne particles, such as those contained in an aerosol, for subsequent analysis. The passive sampler increases the sampling efficiency for diffusion and electrostatic collection of particles by using natural airflow or movement to bring particles closer to the deposition surface. Alternately charged electret filters further increase the sampling efficiency.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 15, 2020
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Jana S Kesavan, Nathan Kesavan, Jerold R Bottiger
  • Patent number: 10539320
    Abstract: A system and method for generating combustion aerosols from liquid fuel. The system includes a furnace with an inner heating tube having a heating tape wrapped thereabout. Further, the system includes a fuel line extending through an inlet end of the heating tube and into the heating tube, and a means for dripping the liquid fuel onto a plurality of different locations on an inner surface of the heating tube. The system further includes a power supply to power the heating tape to heat the inner heating tube to a temperature which can ignite the liquid fuel dripped onto the inner surface of the inner heating tube whereby there is an immediate combustion to form combustion products. Finally, the system includes an air line connected to the heating tube for directing compressed air through the inner heating tube to mix with the combustion products and transport the formed combustion aerosols out of an outlet end of the inner heating tube.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: January 21, 2020
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Jerold R. Bottiger, Jana S. Kesavan, Deborah R. Schepers
  • Patent number: 9533319
    Abstract: An aerosol generator includes a first body having a first end including an exit opening, and an oppositely positioned second end. An open channel second body is substantially positioned inside the first body and extends from the first end to the second end of the first body. An exit opening of the second body is positioned adjacent to the exit opening of the first end of the first body. An insert, which holds material to be aerosolized, is at least partially positioned inside the second body. An inlet opening receives compressed air into the first body. The compressed air flows towards the exit opening of the first end of the first body. The air flow creates a region of low pressure at the exit opening of the second body. The region of low pressure pulls the material out from the second body and aerosolizes the material. The aerosol generator is particularly effective in generating aerosols from small amounts of solid and liquid materials with minimal losses of material.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: January 3, 2017
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Jana S Kesavan, Jerold R. Bottiger
  • Patent number: 9097624
    Abstract: An external filter assembly adapted for modifying a suction cleaning device to sample relatively small particles from various surfaces and/or the ambient air, includes a housing having a first open end, a second open end and a throughbore between the first and second open ends, a filter adapted for capturing particles with particle sizes greater than 0.1 micrometer, the filter being mounted on and enclosing the first open end, and means for securely retaining the second open end of the housing on an exhaust port of the suction cleaning device in communication with the housing throughbore.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: August 4, 2015
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Jerold R. Bottiger, Jana S. Kesavan