Patents by Inventor A. Kumar Das

A. Kumar 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).

  • Compounds and methods for the treatment or prevention of infections
    Patent number: 8158675
    Abstract: Compounds represented by formula I: or pharmaceutically acceptable salts and solvates thereof, wherein R1, X, Y, Y1, and Z are as defined herein, are useful for treating flaviviridae viral infections.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: April 17, 2012
    Assignee: Vertex Pharmaceuticals (Canada) Incorporated
    Inventors: Real Denis, Carl Poisson, Sanjoy Kumar Das, Irina Motorina, Rabindra Rej, Constantin G. Yannopoulos, Laval Chan Chun Kong
  • THIOPHENE ANALOGUES FOR THE TREATMENT OR PREVENTION OF FLAVIVIRUS INFECTIONS
    Publication number: 20120059170
    Abstract: Compounds represented by formula I: or pharmaceutically acceptable salts and solvates thereof, wherein R1, X, Y, and Z are as defined herein, are useful for treating flaviviridae viral infections.
    Type: Application
    Filed: June 29, 2011
    Publication date: March 8, 2012
    Applicant: Vertex Pharmaceuticals ( Canada) Incorporated
    Inventors: Laval Chan Chun Kong, Sanjoy Kumar Das, Carl Poisson, Constantin G. Yannopoulos, Guy Falardeau, Louis Vaillancourt, Réal Denis
  • Apparatus and method for object detection and tracking and roadway awareness using stereo cameras
    Patent number: 8108119
    Abstract: The present invention provides a collision avoidance apparatus and method employing stereo vision applications for adaptive vehicular control. The stereo vision applications are comprised of a road detection function and a vehicle detection and tracking function. The road detection function makes use of three-dimensional point data, computed from stereo image data, to locate the road surface ahead of a host vehicle. Information gathered by the road detection function is used to guide the vehicle detection and tracking function, which provides lead motion data to a vehicular control system of the collision avoidance apparatus. Similar to the road detection function, stereo image data is used by the vehicle detection and tracking function to determine the depth of image scene features, thereby providing a robust means for identifying potential lead vehicles in a headway direction of the host vehicle.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: January 31, 2012
    Assignee: SRI International
    Inventors: John Benjamin Southall, Mayank Bansal, Aastha Jain, Manish Kumar, Theodore Armand Camus, Aveek Kumar Das, John Richard Fields, Gary Alan Greene, Jayakrishnan Eledath
  • Thiazoles derivatives as AMPK activator
    Patent number: 8080668
    Abstract: The present application provides novel thiazole derivatives that are useful as activators of Adenosine 5?-Monophosphate-Activated Protein Kinase and pharmaceutical compositions containing such compounds.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: December 20, 2011
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Vijay Kumar Potluri, Saibal Kumar Das, Pradip Kumar Sasmal, Javed Iqbal, Parimal Misra, Ranjan Chakrabarti, Rashmi Talwar
  • Methods of collagen imaging
    Patent number: 8034898
    Abstract: Diagnostic compositions and methods for imaging and/or assessing collagen are described. The diagnostic compositions can include collagen binding peptides.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: October 11, 2011
    Assignee: Collagen Medical, LLC
    Inventors: Peter D. Caravan, Andrew Kolodziej, Zhaoda Zhang, Stephane Dumas, Biplab Kumar Das, Vincent Jacques, Richard Looby, Steffi K. Koerner, Wei-Chuan Sun, David R. Buckler, Aida Abujoub, Aaron K. Sato
  • FLUID CATALYTIC CRACKING (FCC) PROCESS FOR MANUFACTURING PROPYLENE AND ETHYLENE IN INCREASED YIELD
    Publication number: 20110240523
    Abstract: A fluid catalytic cracking (FCC) process for manufacturing propylene and ethylene in increased yield. The process comprises cracking an olefinic naphtha stream and main hydrocarbon stock in combination with an olefinic C4 hydrocarbon stream in different zones of one or more risers of an FCC unit. Each FCC riser comprises an acceleration zone at the lower portion thereof, a lift stream feed nozzle at the bottom of the acceleration zone, a main hydrocarbon stock feed nozzle above the acceleration zone and an olefinic naphtha feed nozzle at a location along the acceleration zone between the lift stream feed nozzle and main hydrocarbon stock feed nozzle. The cracking is carried out on a mixed FCC catalyst comprising at least 2 percent by weight pentasil zeolite and at least 10 percent by weight Y-zeolite.
    Type: Application
    Filed: December 8, 2009
    Publication date: October 6, 2011
    Inventors: Sukumar Mandal, Asit Kumar Das, Ashwani Yadav, Manoj Yadav, Akhilesh Bhatnagar, Rajeshwar Dongara, Veera Venkata satya Bhaskara sita Rama Murthy Katravulapalli
  • VARIABLE GAIN AMPLIFIER HAVING AUTOMATIC POWER CONSUMPTION OPTIMIZATION
    Publication number: 20110210793
    Abstract: A variable gain amplifier may include a master amplifier that may be configured to generate a first current and a diode coupled with the master amplifier so that the first current passes through the diode which, when the first current is passing through the diode, generates a diode voltage signal. According to embodiments, an error amplifier may include a first input configured to receive a gain control voltage signal and a second input configured to receive the diode voltage signal. The output of the error amplifier may provide a feedback signal. The amplifier may include a circuit configured to generate at least one voltage control signal based on the feedback signal and a slave amplifier configured to adjust a gain amount based on the at least one voltage control signal.
    Type: Application
    Filed: July 21, 2010
    Publication date: September 1, 2011
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Abhijit Kumar Das, Michel Frechette
  • Thiophene analogues for the treatment or prevention of flavivirus infections
    Patent number: 8003685
    Abstract: Compounds represented by formula I: or pharmaceutically acceptable salts and solvates thereof, wherein R1, X, Y, and Z are as defined herein, are useful for treating flaviviridae viral infections.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: August 23, 2011
    Assignee: Vertex Pharmaceuticals (Canada) Incorporated
    Inventors: Laval Chan Chun Kong, Sanjoy Kumar Das, Carl Poisson, Constantin G. Yannopoulos, Guy Falardeau, Louis Vaillancourt, Réal Denis
  • COMPOUNDS AND METHODS FOR THE TREATMENT OR PREVENTION OF FLAVIVIRUS INFECTIONS
    Publication number: 20110200553
    Abstract: The present invention provides novel compounds represented by formula I: or pharmaceutically acceptable salts thereof useful for treating flaviviridae viral infection.
    Type: Application
    Filed: April 7, 2011
    Publication date: August 18, 2011
    Applicant: Vertex Pharmaceuticals Incorporated
    Inventors: Laval Chan Chun Kong, Jean Bedard, Sanjoy Kumar Das, Nghe Nguyen Ba, Oswy Z. Pereira, Thumkunta Jagadeeswar Reddy, Mohammed Arshad Siddiqui, Wuyi Wang, Constanin G. Yannopoulos
  • Compounds and methods for the treatment or prevention of infections
    Patent number: 7985769
    Abstract: The present invention provides novel compounds represented by formula I: or pharmaceutically acceptable salts thereof useful for treating flaviviridae viral infection.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: July 26, 2011
    Assignee: Vertex Pharmaceuticals Incorporated
    Inventors: Laval Chan Chun Kong, Jean Bedard, Sanjoy Kumar Das, Nghe Nguyen Ba, Oswy Z. Pereira, Thumkunta Jagadeeswar Reddy, Mohammad Arshad Siddiqui, Wuyi Wang, Constanin Yannopoulos
  • BENZIMIDAZOLE ANALOGUES FOR THE TREATMENT OR PREVENTION OF FLAVIVIRUS INFECTIONS
    Publication number: 20110172238
    Abstract: Compounds represented by formula I: or pharmaceutically acceptable salts and solvates thereof, wherein A, B, B?, X, Y, R1, R1?, R2, R2?, R3, R3?, R5, R5?, R6, m, n, or p are as defined herein, are useful for treating flaviviridae viral infections.
    Type: Application
    Filed: July 16, 2010
    Publication date: July 14, 2011
    Inventors: James A. Henderson, John Maxwell, Louis Vaillancourt, Mark Morris, Ronald Grey, JR., Simon Giroux, Laval Chan Chun Kong, Sanjoy Kumar Das, Bingcan Liu, Carl Poisson, Caroline Cadilhac, Monica Bubenik, T. Jagadeeswar Reddy, Guy Falardeau, Constantin Yannopoulos, Jian Wang, Oswy Z. Pereira, Youssef L. Bennani, Albert C. Pierce, Govinda Rao Bhisetti, Kevin M. Cottrell, Valerie Marone
  • COMPOSITION FOR TREATMENT OF WATER
    Publication number: 20110117201
    Abstract: The invention relates to a composition for treatment of water comprising rice husk ash and at least one bactericidal agent bonded to the rice husk ash. The bactericidal agent bonded to the rice husk ash is preferably silver and more particularly the bactericidal agent is nano silver. The invention also relates to a method of water purification using a composition comprising rice husk ash and at least one bactericidal agent bonded to the rice husk ash.
    Type: Application
    Filed: December 8, 2008
    Publication date: May 19, 2011
    Inventors: Kalyan Kumar Das, Chetan Premkumar Malhotra
  • Novel beta-phenyl-alpha-oxysubstituted propionic derivatives: process for its preparation and their use in the preparation of pharmaceutically important compounds
    Publication number: 20110105748
    Abstract: The present invention relates to novel propionic acid derivatives. More particularly, the present invention relates to beta-phenyl alpha-oxysubstituted propionic acids of the general formula (I). The present invention also relates to processes for the preparation of compounds of the formula (I) and their use in the preparation of compounds of formula (II).
    Type: Application
    Filed: October 15, 2002
    Publication date: May 5, 2011
    Inventors: Debnath Bhuniya, Saibal Kumar Das, Gurram Ranga Madhavan, Javed Iqbal, Ranjan Chakrabarti, Sankar Mohan, Mohan Chander
  • DYNAMIC LOW POWER RADIO MODES
    Publication number: 20110051639
    Abstract: A receiver in a packet based communication system includes a programmable block and a detection block that detects at least one of an operating condition of the receiver and a protocol condition of the communication system. Further, the receiver includes a control circuit coupled to the programmable block that controls the programmable block to transition to a set of radio modes according to at least one of the operating condition and the protocol condition.
    Type: Application
    Filed: August 25, 2009
    Publication date: March 3, 2011
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sthanunathan Ramakrishnan, Bijoy Bhukania, Jawaharlal Tangudu, Sarma S. Gunturi, Jaiganesh Balakrishnan, Rakesh Kumar, Abhijit Kumar Das, Yogesh Darwhekar
  • Simultaneous Method for the Preparation of a Mixture of 3-acetoxy-17-acetamido-16-formyl-androst-5,17-diene and 3-acetoxy-2'-chloro-5-androsteno[17,16-b]pyridine
    Publication number: 20110028440
    Abstract: The present invention relates to preparation and biological evaluation of 3-acetoxy-17-acetamido-16-formyl-androst-5,17-diene (4) and 3-acetoxy2?-chloro-5-androsteno[17,16-b]pyridine (5) as gastric proton pump inhibitor and their comparison to that of omeprazole, a clinically employed anti-gastric ulcer drug. Compound (4) exhibited dose dependent inhibition of histamine-stimulated acid secretion in gastric parietal cell with an IC50 value comparable to cimetidine. No mortality or behavioral abnormality of Swiss albino mice was observed under single-dose level of 1 g/Kg body weight of compound (4). Compound (4) further exhibited excellent anti ulcer activity in vivo against indomethacin induced ulcer.
    Type: Application
    Filed: March 26, 2009
    Publication date: February 3, 2011
    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Romesh Chandra Boruah, Moyurima Borthkur, Madan Gopal Barthakur, Paruchuri Gangadhar Rao, Sudip Kumar Kar, Annalaxmi Chinniah, Suchandra Goswami, Pratap Kumar Das
  • Methods and Systems for Measuring and Reducing Clock Skew
    Publication number: 20110025391
    Abstract: A technique for a delay measurement system to measure the skews in a clock distribution network is presented. It uses the principle of sub-sampling to measure and amplify small clock skews and determine an estimate of clock skew by further manipulation if these sampled measurements. The technique can be applied to measure clock skew on a computer chip, between bit-line of a communication bus, or between elements connected by an electronic or optical interconnect.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 3, 2011
    Inventors: Bharadwaj Amrutur, Pratap Kumar Das
  • Standalone execution of incomplete data flows
    Patent number: 7860904
    Abstract: Systems, devices, and methods for modularizing data flows and for providing stand-alone execution of incomplete data flows are provided based on an improved data warehousing framework. Data flow modularization and code reuse is improved through the use of the disclosed flowlets and allows for consistent and efficient standalone testing of incomplete data flows. The disclosed details enable various refinements and modifications according to system design considerations.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: December 28, 2010
    Assignee: Microsoft Corporation
    Inventors: Theodore Tak Lee, Slobodan M. Bojanic, Anjan Kumar Das, Grant Dickinson, Mark Durley, Jeff R. Bernhardt
  • Systems and methods for modularizing data flows
    Patent number: 7860905
    Abstract: Systems, devices, and methods for modularizing data flows and for providing stand-alone execution of incomplete data flows are provided based on an improved data warehousing framework. Data flow modularization and code reuse is improved through the use of the disclosed flowlets and allows for consistent and efficient standalone testing of incomplete data flows. The disclosed details enable various refinements and modifications according to system design considerations.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: December 28, 2010
    Assignee: Microsoft Corporation
    Inventors: Slobodan M. Bojanic, Anjan Kumar Das, Theodore Tak Lee, Jeff R. Bernhardt, Mark Durley, James Kelsey Howey, Ranjeeta Nanda
  • Methods and Systems for Managing Image Capturing Devices
    Publication number: 20100302380
    Abstract: A method of selecting an image capturing device in communication with an information handling system (IHS) is disclosed wherein the method includes executing an imaging software application and loading first data corresponding to an image capturing device compatible with the imaging software application, wherein the image capturing device is in communication with the IHS. The method further includes automatically executing a compatible image capturing device corresponding to the imaging software application. An information handling system (IHS) is further disclosed including a storage medium operable to store an imaging software application. The system further includes memory coupled to a processor, wherein the processor is configured to execute the imaging software application.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 2, 2010
    Applicant: DELL PRODUCTS L.P.
    Inventors: Boon Kiat Law, Tapas Kumar Das, Kar Vui Chin
  • METHOD FOR ENABLING MOBILITY OF CLIENT DEVICES IN LARGE SCALE UNIFIED NETWORKS
    Publication number: 20100290446
    Abstract: Embodiments herein include systems and methods for providing a mechanism to enable smooth, seamless, and reliable connectivity for wireless devices in a unified network. The system supports roaming of mobile units across mobility switches. A given mobile unit can retain its IP address in both intra-subnet and inter-subnet roaming scenarios. The given mobile unit also retains its membership to a mobility VLAN to which it had been assigned, even during roaming scenarios. Embodiments include a framework for wireless switches to advertise VLANs they support to peer wireless switches in the mobility domain, and to advertise their capability to act as VLAN servers for those VLANs. Embodiments support VLAN membership management capabilities that allow access points and peer wireless switches to request wireless switches to add VLANs to the tunnels they share.
    Type: Application
    Filed: May 7, 2010
    Publication date: November 18, 2010
    Applicant: AVAYA INC.
    Inventors: Vivek L. Atreya, Shashi H. Ankaiah, Seemant Choudhary, Kumar Das Karunakaran, Udaya N. Shankar