Patents by Inventor Prakash Narayan
Prakash Narayan 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).
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Patent number: 10179296Abstract: Systems and methods related to desalination systems are described herein. According to some embodiments, the desalination systems are transiently operated and/or configured to facilitate transient operation. In some embodiments, a liquid stream comprising water and at least one dissolved salt is circulated through a fluidic circuit comprising a desalination system. In some embodiments, a portion of the desalination system (e.g., a humidifier) is configured to remove at least a portion of the water from the liquid stream to produce a concentrated brine stream enriched in the dissolved salt. In certain cases, the concentrated brine stream is recirculated through the fluidic circuit until the concentrated brine stream reaches a relatively high density (e.g., at least about 10 pounds per gallon) and/or a relatively high salinity (e.g., a total dissolved salt concentration of at least about 25 wt %).Type: GrantFiled: May 21, 2015Date of Patent: January 15, 2019Assignee: Gradiant CorporationInventors: Prakash Narayan Govindan, Maximus G. St. John, Steven Lam, Mark Zaloudek, Karim M. Chehayeb, Samar Shah
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Publication number: 20190009218Abstract: Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity—compared to a water purity of an aqueous feed stream—is produced. In some embodiments, multiple draw streams can be NI used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.Type: ApplicationFiled: July 29, 2016Publication date: January 10, 2019Applicant: Gradiant CorporationInventors: Looh Tchuin Choong, Prakash Narayan Govindan, Maximus G. St. John, Steven Lam, Jonn-Ross Andrews, Karim M. Chehayeb
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Publication number: 20190002306Abstract: Systems and methods related to desalination systems are described herein. According to some embodiments, the desalination systems are transiently operated and/or configured to facilitate transient operation. In some embodiments, a liquid stream comprising water and at least one dissolved salt is circulated through a fluidic circuit comprising a desalination system. In some embodiments, a portion of the desalination system (e.g., a humidifier) is configured to remove at least a portion of the water from the liquid stream to produce a concentrated brine stream enriched in the dissolved salt. In certain cases, the concentrated brine stream is recirculated through the fluidic circuit until the concentrated brine stream reaches a relatively high density (e.g., at least about 10 pounds per gallon) and/or a relatively high salinity (e.g., a total dissolved salt concentration of at least about 25 wt %).Type: ApplicationFiled: April 30, 2018Publication date: January 3, 2019Applicant: Gradiant CorporationInventors: Prakash Narayan Govindan, Maximus G. St. John, Steven Lam, Mark Zaloudek, Karim M. Chehayeb, Samar Shah
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Patent number: 10167218Abstract: Water treatment systems and associated methods are generally described. Certain embodiments of the water treatment systems and methods described herein may be used to treat water comprising one or more contaminants (e.g., oil, grease, suspended solids, scale-forming ions, volatile organic material) to remove at least a portion of the one or more contaminants. In some embodiments, at least a portion of the treated water may be used directly in certain applications (e.g., oil and/or gas extraction processes). In some embodiments, at least a portion of the treated water may undergo desalination to produce substantially pure water and/or concentrated brine.Type: GrantFiled: February 11, 2016Date of Patent: January 1, 2019Assignee: Gradiant CorporationInventors: Maximus G. St. John, Steven Lam, Prakash Narayan Govindan
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Patent number: 10144654Abstract: Selective scaling in water treatment systems in which desalination is performed is generally described. According to certain embodiments, the location of the formation of solid scale within a water treatment system is controlled by adjusting one or more system parameters, such as the temperature and/or flow velocity of a saline stream within the water treatment system.Type: GrantFiled: November 17, 2015Date of Patent: December 4, 2018Assignee: Gradiant CorporationInventors: Prakash Narayan Govindan, Steven Lam, Maximus G. St. John, Jonn-Ross Andrews
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Patent number: 10143936Abstract: Embodiments described herein generally relate to apparatuses that include a vessel comprising a humidification region (e.g., a bubble column humidification region) and a dehumidification region (e.g., a bubble column dehumidification region), and associated systems and methods. In certain embodiments, the apparatuses are configured to include various internal features, such as vapor distribution regions and/or liquid flow control weirs and/or baffles. In some cases, the apparatuses are used in water purification systems, such as desalination systems. The water purification systems may comprise additional devices external to the apparatuses, such as one or more heat exchangers, one or more heating devices, and/or one or more cooling devices.Type: GrantFiled: May 21, 2015Date of Patent: December 4, 2018Assignee: Gradiant CorporationInventors: Prakash Narayan Govindan, Steven Lam, Maximus G. St. John
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Systems including an apparatus comprising both a humidification region and a dehumidification region
Patent number: 10143935Abstract: Embodiments described herein generally relate to apparatuses that include a vessel comprising a humidification region (e.g., a bubble column humidification region) and a dehumidification region (e.g., a bubble column dehumidification region), and associated systems and methods. In certain embodiments, the apparatuses are configured to include various internal features, such as vapor distribution regions and/or liquid flow control weirs and/or baffles. In some cases, the apparatuses are used in water purification systems, such as desalination systems. The water purification systems may comprise additional devices external to the apparatuses, such as one or more heat exchangers, one or more heating devices, and/or one or more cooling devices.Type: GrantFiled: May 21, 2015Date of Patent: December 4, 2018Assignee: Gradiant CorporationInventors: Prakash Narayan Govindan, Steven Lam, Maximus G. St. John -
Patent number: 10142381Abstract: The invention is based, in part, on a system for allowing at least one client to real-time monitor and, or playback at least one real-world recognized event via at least one processor-controlled video camera, said system comprising: a processor; a non-transitory storage medium coupled to the processor; encoded instructions stored in the non-transitory storage medium, which when executed by the processor, cause the processor to: detect a threshold-grade event from audio-video data of a real-world environment captured from a processor-controlled video camera by an event detection module within an event management system applying event detection parameters; analyze the threshold-grade event for categorization into any one of a recognized event by an event recognition module within the event management system applying event recognition parameters; transmit at least any one of a single stream of the recognized event and, or a single stream of a audio-video sequence succeeding and, or preceding the recognized eventType: GrantFiled: March 20, 2017Date of Patent: November 27, 2018Assignee: IntelliVision Technologies Corp.Inventors: Vaidhi Nathan, Krishna Khadloya, Albert Kay, Prakash Narayan
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Publication number: 20180327278Abstract: A feed liquid flows into a second-stage humidifier chamber to form a second-stage humidifier bath. A first remnant of the feed liquid from the second-stage humidifier chamber then flows into a first-stage humidifier chamber to form a first-stage humidifier bath having a temperature lower than that of the second-stage bath. A second remnant of the feed liquid is then removed from the first-stage humidifier. Meanwhile, a carrier gas is injected into and bubbled through the first-stage humidifier bath, collecting a vaporizable component in vapor form from the first remnant of the feed liquid to partially humidify the carrier gas. The partially humidified carrier gas is then bubbled through the second-stage humidifier bath, where the carrier gas collects more of the vaporizable component in vapor form from the feed liquid to further humidify the carrier gas before the humidified carrier gas is removed from the second-stage humidifier chamber.Type: ApplicationFiled: July 23, 2018Publication date: November 15, 2018Applicant: Massachusetts Institute of TechnologyInventors: Prakash Narayan Govindan, Mostafa H. Elsharqawy, Steven Lam, Maximus G. St. John, John H. Lienhard
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Publication number: 20180254830Abstract: The present disclosure discloses a connectivity identification system for identifying connectivity in a OFC network (100) in a central office. The connectivity identification system comprises a transducer device (101) and an ultrasound communicator (107). When the transducer device (101) is connected to a first node (102), the ultrasound communicator (107) is configured to transmit an ultrasound signal modulated with a unique identifier, through an outer jacket of a Fiber Optic (FO) patch cord, connected between a transmitting port (105) of the first node (102) and a receiving port (106) of a second node (103). When the transducer device (101) is connected to the second node, the ultrasound communicator (107) is configured to receive the ultrasound signal from the transceiver unit (301), demodulate the ultrasound signal to retrieve the unique identifier and identify the receiving port (106) based on the demodulated unique identifier.Type: ApplicationFiled: March 20, 2017Publication date: September 6, 2018Inventors: Swapnil Prakash Narayan SRIVASTAVA, Ujwal KAPOOR
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Patent number: 10069569Abstract: The present disclosure discloses a connectivity identification system for identifying connectivity in a OFC network (100) in a central office. The connectivity identification system comprises a transducer device (101) and an ultrasound communicator (107). When the transducer device (101) is connected to a first node (102), the ultrasound communicator (107) is configured to transmit an ultrasound signal modulated with a unique identifier, through an outer jacket of a Fiber Optic (FO) patch cord, connected between a transmitting port (105) of the first node (102) and a receiving port (106) of a second node (103). When the transducer device (101) is connected to the second node, the ultrasound communicator (107) is configured to receive the ultrasound signal from the transceiver unit (301), demodulate the ultrasound signal to retrieve the unique identifier and identify the receiving port (106) based on the demodulated unique identifier.Type: GrantFiled: March 20, 2017Date of Patent: September 4, 2018Assignee: Wipro LimitedInventors: Swapnil Prakash Narayan Srivastava, Ujwal Kapoor
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Publication number: 20180244545Abstract: Disclosed herein are systems and methods in which multivalent ions are selectively retained in an aqueous stream. According to certain embodiments, multiple separations may be used to process an aqueous feed stream containing solubilized monovalent ions and solubilized multivalent ions to produce a stream enriched in the solubilized multivalent ions. The separations may be arranged, according to certain embodiments, to enhance the overall separation process such that the product stream contains—relative to the initial aqueous feed stream—a high amount of solubilized multivalent ions, a high amount of water from the aqueous feed stream, and/or a high ratio of solubilized multivalent ions to solubilized monovalent ions.Type: ApplicationFiled: August 12, 2016Publication date: August 30, 2018Applicant: Gradiant CorporationInventors: Maximus G. St. John, Looh Tchuin Choong, Prakash Narayan Govindan
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Publication number: 20180236406Abstract: Disclosed herein are systems and methods in which ion-selective separation and multi-stage osmotic separation is used to produce multivalent-ion-rich process streams. According to certain embodiments, multiple separations may be used to process an aqueous feed stream containing solubilized monovalent ions and solubilized multivalent ions to produce a stream enriched in the multivalent ions. The separations may be arranged, according to certain embodiments, to enhance the overall separation process such that the product stream contains—relative to the initial aqueous feed stream—a high amount of multivalent ions, a high amount of water from the aqueous feed stream, and/or a high ratio of multivalent ions to monovalent ions.Type: ApplicationFiled: August 12, 2016Publication date: August 23, 2018Applicant: Gradiant CorporationInventors: Maximus G. St. John, Looh Tchuin Choong, Prakash Narayan Govindan
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Publication number: 20180236372Abstract: Disclosed herein are systems and methods in which an aqueous stream comprising solubilized monovalent ions and solubilized multivalent ions is processed such that multivalent ions are selectively retained and monovalent ions are selectively removed. According to certain embodiments, an aqueous feed stream is transported through an ion-selective separator to produce a multivalent-ion-enriched stream and a monovalent-ion-enriched stream. The monovalent-ion-enriched stream may be transported through a desalination apparatus to produce a substantially pure water stream and a concentrated aqueous stream.Type: ApplicationFiled: August 12, 2016Publication date: August 23, 2018Applicant: Gradiant CorporationInventors: Prakash Narayan Govindan, Maximus G. St. John
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Patent number: 10053373Abstract: A feed liquid flows into a second-stage humidifier chamber to form a second-stage humidifier bath. A first remnant of the feed liquid from the second-stage humidifier chamber then flows into a first-stage humidifier chamber to form a first-stage humidifier bath having a temperature lower than that of the second-stage bath. A second remnant of the feed liquid is then removed from the first-stage humidifier. Meanwhile, a carrier gas is injected into and bubbled through the first-stage humidifier bath, collecting a vaporizable component in vapor form from the first remnant of the feed liquid to partially humidify the carrier gas. The partially humidified carrier gas is then bubbled through the second-stage humidifier bath, where the carrier gas collects more of the vaporizable component in vapor form from the feed liquid to further humidify the carrier gas before the humidified carrier gas is removed from the second-stage humidifier chamber.Type: GrantFiled: July 22, 2015Date of Patent: August 21, 2018Assignees: Massachusetts Institute of Technology, King Fahd University of Petroleum and MineralsInventors: Prakash Narayan Govindan, Mostafa H. Elsharqawy, Steven Lam, Maximus G. St. John, John H. Lienhard
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Patent number: 9981860Abstract: Systems and methods related to desalination systems are described herein. According to some embodiments, the desalination systems are transiently operated and/or configured to facilitate transient operation. In some embodiments, a liquid stream comprising water and at least one dissolved salt is circulated through a fluidic circuit comprising a desalination system. In some embodiments, a portion of the desalination system (e.g., a humidifier) is configured to remove at least a portion of the water from the liquid stream to produce a concentrated brine stream enriched in the dissolved salt. In certain cases, the concentrated brine stream is recirculated through the fluidic circuit until the concentrated brine stream reaches a relatively high density (e.g., at least about 10 pounds per gallon) and/or a relatively high salinity (e.g., a total dissolved salt concentration of at least about 25 wt %).Type: GrantFiled: March 21, 2017Date of Patent: May 29, 2018Assignee: Gradiant CorporationInventors: Prakash Narayan Govindan, Maximus G. St. John, Steven Lam, Mark Zaloudek, Karim M. Chehayeb, Samar Shah
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Patent number: 9969638Abstract: Water treatment systems and associated methods are generally described. Certain of the water treatment systems and methods described herein can be used to pre-treat an aqueous stream that is subsequently transported to a desalination apparatus and/or post-treat an aqueous stream that has been produced by a desalination apparatus.Type: GrantFiled: August 5, 2014Date of Patent: May 15, 2018Assignee: Gradiant CorporationInventors: Prakash Narayan Govindan, Steven Lam, Maximus G. St. John
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Patent number: 9957180Abstract: Cations that can precipitate from an aqueous composition to produce scaling are sequestered by adding a multi-dentate ligand to the aqueous composition. The multi-dentate ligand bonds with the cation to form a non-scaling ionic complex; and the aqueous solution with the ionic complex is used in a process that produces substantially pure water from the aqueous composition, where the cation, absent formation of the ionic complex, is subject to scaling. The pH of the aqueous composition (or a brine including components of the aqueous composition) is then reduced to release the cation from the multi-dentate ligand; and the multi-dentate ligand, after the cation is released, is then reused in a predominantly closed loop.Type: GrantFiled: March 2, 2017Date of Patent: May 1, 2018Assignee: Massachusetts Institute of TechnologyInventors: Prakash Narayan Govindan, Windsor Sung, Steven Lam, Maximus G. St. John, John H. Lienhard, Mohammed Mirhi, Anurag Bajpayee
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Publication number: 20180104649Abstract: An osmotic membrane comprises an active layer and a composite support layer. The active layer selectively allows passage of water molecules but rejects at least some dissolved ions. The composite support layer includes a side that is bonded to the active layer and comprises an electrospun-fiber sub-layer and a phase-inversion sub-layer.Type: ApplicationFiled: October 18, 2017Publication date: April 19, 2018Applicant: Gradiant CorporationInventors: Prakash Narayan Govindan, Looh Tchuin Choong
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Publication number: 20180093982Abstract: The present invention provides methods for treating polycystic kidney disease by administering a compound or pharmaceutical composition thereof having the general structural formula (I) and pharmaceutically acceptable derivatives thereof, as described generally and in classes and subclasses herein.Type: ApplicationFiled: April 16, 2017Publication date: April 5, 2018Applicant: ANGION BIOMEDICA CORP.Inventors: Prakash NARAYAN, Brian HUANG, Prani PAKA, Latha PAKA, Itzhak D. GOLDBERG