Patents by Inventor Rusi P. Taleyarkhan

Rusi P. Taleyarkhan 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: 20210023739
    Abstract: An amorphous polylactic acid polymer having a weight average molecular weight in the range of about 35,000 to 180,000 is described. The polylactic acid polymer composition can be hammer milled without cryogenics result in the form of particles wherein 90% of the particles have particle size of about 250 ?m or less and the material has a glass transition temperature of between about 55° C. to about 58° C. and a relative viscosity of about 1.45 to about 1.95 centipoise. The polymer composition can be used to form an aqueous suspension. The material is ideally suited for use in preparing particleboard. A method is disclosed for preparing such polylactic acid polymers. The method involves obtaining an amorphous polylactic acid polymer having a weight average molecular weight of between about 115,000 to about 180,000. Treating the polylactic acid polymer to reduce the molecular weight to between about 35,000 to 45,000 such that it has a glass transition temperature of between about 55° C. and 58° C.
    Type: Application
    Filed: October 9, 2020
    Publication date: January 28, 2021
    Applicant: Purdue Research Foundation
    Inventors: Rusi P. Taleyarkhan, Brian C. Archambault, Alexander Charles Bakken
  • Patent number: 10843372
    Abstract: An amorphous polylactic acid polymer having a weight average molecular weight in the range of about 35,000 to 180,000 is described. The polylactic acid polymer composition can be hammer milled without cryogenics result in the form of particles wherein 90% of the particles have particle size of about 250 ?m or less and the material has a glass transition temperature of between about 55° C. to about 58° C. and a relative viscosity of about 1.45 to about 1.95 centipoise.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: November 24, 2020
    Assignee: Purdue Research Foundation
    Inventors: Rusi P. Taleyarkhan, Brian C Archambault, Alexander Charles Bakken
  • Patent number: 10718874
    Abstract: Methods and systems that utilize centrifugally tensioned metastable fluid detector (CTMFD) sensors and an external probing source to detect the presence of fissile and fissionable materials, including but not limited to special nuclear materials (SNMs), in containers. Such a method includes subjecting a container to probing with a fission-inducing radiation species that induces fission in an fissile or fissionable material, detecting fission neutrons emitted from the fissile or fissionable material with CTMFD sensors that each contain a detection fluid in which the fission neutrons induce cavitation in a centrifugally tensioned portion of the detection fluid. A threshold energy neutron analysis mode is then utilized to reject the radiation species and detect a fraction of the fission neutrons that have energies above a predetermined energy threshold determined by centrifugally-induced tension in the centrifugally tensioned portion of the detection fluid within each of the CTMFD sensors.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: July 21, 2020
    Assignee: Purdue Research Foundation
    Inventors: Rusi P. Taleyarkhan, Brian C. Archambault, Thomas Grimes, Alex Hagen
  • Publication number: 20190277984
    Abstract: Methods and systems that utilize centrifugally tensioned metastable fluid detector (CTMFD) sensors and an external probing source to detect the presence of fissile and fissionable materials, including but not limited to special nuclear materials (SNMs), in containers. Such a method includes subjecting a container to probing with a fission-inducing radiation species that induces fission in an fissile or fissionable material, detecting fission neutrons emitted from the fissile or fissionable material with CTMFD sensors that each contain a detection fluid in which the fission neutrons induce cavitation in a centrifugally tensioned portion of the detection fluid. A threshold energy neutron analysis mode is then utilized to reject the radiation species and detect a fraction of the fission neutrons that have energies above a predetermined energy threshold determined by centrifugally-induced tension in the centrifugally tensioned portion of the detection fluid within each of the CTMFD sensors.
    Type: Application
    Filed: October 23, 2018
    Publication date: September 12, 2019
    Inventors: Rusi P. Taleyarkhan, Brian C. Archambault, Thomas Grimes, Alex Hagen
  • Patent number: 10386507
    Abstract: Tensioned metastable fluid detectors are disclosed that minimize false positive detection events. The methods involve the use of new fluids that provide improved neutron-alpha fission detection at reduced tension states. The rate of spin is also increased using a new protocol that avoids the creation of liquid imbalances in the arms of a CTMFD (centrifugally tensioned metastable fluid detector). The disclosed CTMFD radiation detection system includes a detector assembly containing a detection fluid, a base, a safety enclosure, a motor and motor mounting bracket, speed sensors, a cooling system that includes an air inlet and outlet and a safety enclosure. The CTMFD radiation detection system can include a plurality of independent detector arms having fluids with distinct Pneg requirements such that the range of detectable radiation is increased. Also disclosed are methods for detecting radiation using the disclosed CTMFD radiation detection system. Motor speed calibration procedures are also disclosed.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: August 20, 2019
    Assignee: Purdue Research Foundation
    Inventor: Rusi P. Taleyarkhan
  • Patent number: 10310100
    Abstract: Alpha particle detecting devices are disclosed that have a chamber that can hold a fluid in a tensioned metastable state. The chamber is tuned with a suitable fluid and tension such that alpha emitting materials such as radon and one or more of its decay products can be detected. The devices can be portable and can be placed in areas, such as rooms in dwellings or laboratories and used to measure radon in these areas, in situ and in real time. The disclosed detectors can detect radon at and below 4 pCi/L in air; also, at and below 4,000 pCi/L or 300 pCi/L in water. When the fluid is tensioned the presence of radon can be determined by the formation of bubbles which give off detectable signals including a shock wave, light-beam cutoff, or a light burst, any of which can be measured to derive information on radon and progeny radioactivity levels in air or water.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: June 4, 2019
    Assignee: Purdue Research Foundation
    Inventor: Rusi P. Taleyarkhan
  • Publication number: 20180348379
    Abstract: Alpha particle detecting devices are disclosed that have a chamber that can hold a fluid in a tensioned metastable state. The chamber is tuned with a suitable fluid and tension such that alpha emitting materials such as radon and one or more of its decay products can be detected. The devices can be portable and can be placed in areas, such as rooms in dwellings or laboratories and used to measure radon in these areas, in situ and in real time. The disclosed detectors can detect radon at and below 4 pCi/L in air; also, at and below 4,000 pCi/L or 300 pCi/L in water. When the fluid is tensioned the presence of radon can be determined by the formation of bubbles which give off detectable signals including a shock wave, light-beam cutoff, or a light burst, any of which can be measured to derive information on radon and progeny radioactivity levels in air or water.
    Type: Application
    Filed: June 26, 2017
    Publication date: December 6, 2018
    Inventor: Rusi P. Taleyarkhan
  • Patent number: 10093824
    Abstract: Protective coatings and methods for forming them are disclosed wherein the coatings have increased abrasion, impact and scratch resistance as compared to known coatings. The coatings are made from environmentally friendly materials such as polylactic acid which can be derived from corn. The materials can be used to provide a protective coating on their substrate materials including especially wood for flooring and furniture. The coatings can have a hardness as measured on the Shore D Scale that can reach at least 75 to about 85 and enhanced resistance to abrasions, impact or scratches and can be used to coat flooring or furniture surfaces. The coatings can contain from about 1 to about 10 mass percent of triallyl isocyanurate with respect to polylactic acid.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: October 9, 2018
    Assignee: Sagamore Adams Laboratories LLC
    Inventors: Rusi P. Taleyarkhan, Nicholas Edward Hume, Alexander Charles Bakken, Thomas Francis Grimes
  • Publication number: 20180162993
    Abstract: An amorphous polylactic acid polymer having a weight average molecular weight of about 35,000 to 45,000 is described. The polylactic acid polymer composition can be of particles wherein 90% of the particles have a size of 250 nm or less, a glass transition temperature about 55 to 58 degrees centigrade, and a relative viscosity at 30 degrees centigrade between 1.65 to 1.95. The polymer composition can be used to form an aqueous suspension. The material is ideal in preparing particleboards. A method is disclosed for preparing such polylactic acid polymers. The method involves obtaining an amorphous polylactic acid polymer having a weight average molecular weight of between 115,000 to 180,000. Treating the polylactic acid polymer to reduce the molecular weight between 35,000 to 45,000 such that the glass transition temperature is about 55 to 58 degrees centigrade and a relative viscosity at 30 degrees centigrade about 1.65 to 1.95. 90% of the particles must have an average diameter of 250 nm or less.
    Type: Application
    Filed: May 13, 2016
    Publication date: June 14, 2018
    Inventor: Rusi P. Taleyarkhan
  • Publication number: 20170248707
    Abstract: Tensioned metastable fluid detectors are disclosed that minimize false positive detection events. The methods involve the use of new fluids that provide improved neutron-alpha fission detection at reduced tension states. The rate of spin is also increased using a new protocol that avoids the creation of liquid imbalances in the arms of a CTMFD (centrifugally tensioned metastable fluid detector). The disclosed CTMFD radiation detection system includes a detector assembly containing a detection fluid, a base, a safety enclosure, a motor and motor mounting bracket, speed sensors, a cooling system that includes an air inlet and outlet and a safety enclosure. The CTMFD radiation detection system can include a plurality of independent detector arms having fluids with distinct Pneg requirements such that the range of detectable radiation is increased. Also disclosed are methods for detecting radiation using the disclosed CTMFD radiation detection system. Motor speed calibration procedures are also disclosed.
    Type: Application
    Filed: August 28, 2015
    Publication date: August 31, 2017
    Inventor: Rusi P. Taleyarkhan
  • Publication number: 20170199288
    Abstract: A method of determining directionality of radiation is disclosed which comprises dividing the tensioned metastable fluid liquid volume adjacent to a radioactive source into a plurality of sectors, determining the opposing sector ratio of the respective sector and determining the direction of the radiation based on the opposing sector ratios of the plurality of sectors. The method further comprising determining directionality of incoming radiation from the tension pressure assisted elongation of bubble shapes pointing towards direction of radiation particles that interacted with nuclei of tensioned metastable fluid detector system. A device capable of carrying out these methods is also disclosed.
    Type: Application
    Filed: November 30, 2015
    Publication date: July 13, 2017
    Inventor: Rusi P. Taleyarkhan
  • Patent number: 9689995
    Abstract: Alpha particle detecting devices are disclosed that have a chamber that can hold a fluid in a tensioned metastable state. The chamber is tuned with a suitable fluid and tension such that alpha emitting materials such as radon and one or more of its decay products can be detected. The devices can be portable and can be placed in areas, such as rooms in dwellings or laboratories and used to measure radon in these areas, in situ and in real time. The disclosed detectors can detect radon at and below 4 pCi/L in air; also, at and below 4,000 pCi/L or 300 pCi/L in water.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: June 27, 2017
    Assignee: Purdue Research Foundation
    Inventor: Rusi P. Taleyarkhan
  • Publication number: 20160202360
    Abstract: A system to detect ionizing particles that includes an enclosure which holds a fluid in a tensioned metastable state. The interaction of a particle with the liquid creates a vapor pocket that can be seen and recorded, and also results in a shock wave that can be heard and recorded. The level of tension metastability in combination with agents, such as Be and B atoms, and surfactants that minimize evaporation losses is associated with a particular type of particle.
    Type: Application
    Filed: November 23, 2015
    Publication date: July 14, 2016
    Inventor: Rusi P. Taleyarkhan
  • Patent number: 9348039
    Abstract: A directional-position sensing fast neutron sensor system is disclosed. The system includes one or more acoustically tensioned metastable fluid detector (ATMFD) for determining the direction of the source of incident neutron radiation. The system has been used to detect the position of a 1 Ci Pu—Be neutron radiation source. The ATMFD detector is comparable in technical performance with directional fast neutron detector-bank technologies but is significantly more economical, smaller, and has little to no interference from nonneutron background radiation. The ATMFD detector can be used to locate hidden neutron sources and has been used in blind tests to do so. Specifically an ATMFD system (with a 6×10 cm cross-sectional area) provides directional information for incoming neutron radiation from an 8 kg Pu source from a distance of 25 m with a resolution of 11.2° at a 68% confidence within 60 seconds. Position and neutron source image sensing were also demonstrated using two ATMFDs.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: May 24, 2016
    Assignee: Purdue Research Foundation
    Inventors: Rusi P. Taleyarkhan, Brian Archambault
  • Patent number: 9201151
    Abstract: A method of determining directionality of radiation is disclosed which comprises dividing the tensioned metastable fluid liquid volume adjacent to a radioactive source into a plurality of sectors, determining the opposing sector ratio of the respective sector and determining the direction of the radiation based on the opposing sector ratios of the plurality of sectors. The method further comprising determining directionality of incoming radiation from the tension pressure assisted elongation of bubble shapes pointing towards direction of radiation particles that interacted with nuclei of tensioned metastable fluid detector system. A device capable of carrying out these methods is also disclosed.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: December 1, 2015
    Assignee: Sagamore/Adams Laboratories LLC
    Inventor: Rusi P. Taleyarkhan
  • Publication number: 20150212212
    Abstract: Alpha particle detecting devices are disclosed that have a chamber that can hold a fluid in a tensioned metastable state. The chamber is tuned with a suitable fluid and tension such that alpha emitting materials such as radon and one or more of its decay products can be detected. The devices can be portable and can be placed in areas, such as rooms in dwellings or laboratories and used to measure radon in these areas, in situ and in real time. The disclosed detectors can detect radon at and below 4 pCi/L in air; also, at and below 4,000 pCi/L or 300 pCi/L in water.
    Type: Application
    Filed: August 5, 2013
    Publication date: July 30, 2015
    Inventor: Rusi P. Taleyarkhan
  • Publication number: 20140339426
    Abstract: A directional-position sensing fast neutron sensor system is disclosed. The system includes one or more acoustically tensioned metastable fluid detector (ATMFD) for determining the direction of the source of incident neutron radiation. The system has been used to detect the position of a 1 Ci Pu—Be neutron radiation source. The ATMFD detector is comparable in technical performance with directional fast neutron detector-bank technologies but is significantly more economical, smaller, and has little to no interference from nonneutron background radiation. The ATMFD detector can be used to locate hidden neutron sources and has been used in blind tests to do so. Specifically an ATMFD system (with a 6×10 cm cross-sectional area) provides directional information for incoming neutron radiation from an 8 kg Pu source from a distance of 25 m with a resolution of 11.2° at a 68% confidence within 60 seconds. Position and neutron source image sensing were also demonstrated using two ATMFDs.
    Type: Application
    Filed: December 13, 2012
    Publication date: November 20, 2014
    Inventors: Rusi P. Taleyarkhan, Brian Archambault
  • Publication number: 20140227543
    Abstract: Protective coatings and methods for forming them are disclosed wherein the coatings have increased abrasion, impact and scratch resistance as compared to known coatings. The coatings are made from environmentally friendly materials such as polylactic acid which can be derived from corn. The materials can be used to provide a protective coating on their substrate materials including especially wood for flooring and furniture. The coatings can have a hardness as measured on the Shore D Scale that can reach at least 75 to about 85 and enhanced resistance to abrasions, impact or scratches and can be used to coat flooring or furniture surfaces. The coatings can contain from about 1 to about 10 mass percent of triallyl isocyanurate with respect to polylactic acid.
    Type: Application
    Filed: May 11, 2012
    Publication date: August 14, 2014
    Inventors: Rusi P. Taleyarkhan, Nicholas Edward Hume, Alexander Charles Bakken, Thomas Francis Grimes
  • Publication number: 20140008537
    Abstract: A method of determining directionality of radiation is disclosed which comprises dividing the tensioned metastable fluid liquid volume adjacent to a radioactive source into a plurality of sectors, determining the opposing sector ratio of the respective sector and determining the direction of the radiation based on the opposing sector ratios of the plurality of sectors. The method further comprising determining directionality of incoming radiation from the tension pressure assisted elongation of bubble shapes pointing towards direction of radiation particles that interacted with nuclei of tensioned metastable fluid detector system. A device capable of carrying out these methods is also disclosed.
    Type: Application
    Filed: May 2, 2013
    Publication date: January 9, 2014
    Inventor: Rusi P. Taleyarkhan
  • Patent number: 8436316
    Abstract: A method of determining directionality of radiation is disclosed which comprises dividing the tensioned metastable fluid liquid volume adjacent to a radioactive source into a plurality of sectors, determining the opposing sector ratio of the respective sector and determining the direction of the radiation based on the opposing sector ratios of the plurality of sectors. The method further comprising determining directionality of incoming radiation from the tension pressure assisted elongation of bubble shapes pointing towards direction of radiation particles that interacted with nuclei of tensioned metastable fluid detector system. A device capable of carrying out these methods is also disclosed.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: May 7, 2013
    Assignee: Sagamore/Adams Laboratories LLC
    Inventor: Rusi P. Taleyarkhan