Patents by Inventor Ranjan Chakrabarti

Ranjan Chakrabarti 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: 11816073
    Abstract: Database commands may be asynchronously forwarded between nodes of a database system. A read-only node may receive a request, such as a read request or write request, and determine that the request should be forwarded to a read-only node for performance. A thread that handles the request may forward the request to the read-only node and register a call-back event for a response to the request and be made available to perform other work. When the response from the read-write node is received, the call-back event may be triggered and return a response to the request using the same or different thread.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: November 14, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Dhruva Ranjan Chakrabarti, Atrayee Mullick, Suhas Keshavamurthy, Alexandre Olegovich Verbitski, Saraswathy Narayan, Yingjie He
  • Patent number: 11386072
    Abstract: Automatic consistency is implemented for forwarding writes in a database system. A read-only node may support both read and write requests to a database. The read only node may forward write requests to a read-write node. The read-only node may determine whether to include the forwarded requests in a version of the database for a read request automatically according to a consistency specified for a read request.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: July 12, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Saraswathy Narayan, Gopi Krishna Attaluri, Dhruva Ranjan Chakrabarti, Atrayee Mullick, Damien Katz, Alexandre Olegovich Verbitski, Tengiz Kharatishvili, Yingjie He
  • Patent number: 9189297
    Abstract: Systems, methods, and computer-readable and executable instructions are provided for managing shared memory. A method for managing shared memory can include statically assigning a first number of locks to the shared memory during compile-time and dynamically assigning a second number of locks to the shared memory during runtime.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: November 17, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dhruva Ranjan Chakrabarti, Sandya Srivilliputtur Mannarswamy
  • Publication number: 20120151155
    Abstract: Systems, methods, and computer-readable and executable instructions are provided for managing shared memory. A method for managing shared memory can include statically assigning a first number of locks to the shared memory during compile-time and dynamically assigning a second number of locks to the shared memory during runtime.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 14, 2012
    Inventors: Dhruva Ranjan Chakrabarti, Sandya Srivilliputtur Mannarswamy
  • 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
  • Patent number: 7996825
    Abstract: One embodiment disclosed relates to a method of compiling a computer program. A plurality of modules of source code is received, and intermediate representations corresponding to the modules are generated. A set of data from the intermediate representations is extracted to create an inliner summary for each module. Using the inliner summaries and a globally-sorted working-list based order, an inline analysis phase determines which call sites in the modules are to be inlined by substituting code from a called module. The propagation of summaries may be done elaborately, potentially throughout the call-graph. The goodness of call sites may be computed with a view to comparing them and ordering them in a descending order of goodness.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: August 9, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dhruva Ranjan Chakrabarti, Shin-Ming Liu
  • 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
  • Patent number: 7598293
    Abstract: The present invention relates to novel antidiabetic, hypolipidemic, antiobesity and hypocholesterolemic compounds of formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: October 6, 2009
    Assignee: Dr. Reddy's Laboratories, Inc.
    Inventors: Bhuniya Debnath, Saibal Kumar Das, Gurram Ranga Madhaven, Javed Iqbal, Ranjan Chakrabarti, Reeba Kannimel Vikramadithyan
  • Publication number: 20080221088
    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: Application
    Filed: June 23, 2006
    Publication date: September 11, 2008
    Inventors: Vijay Kumar Potluri, Saibal Kumar Das, Pradip Kumar Sasmal, Javed Iqbal, Parimal Misra, Ranjan Chakrabarti, Rashmi Talwar
  • Publication number: 20080114005
    Abstract: There are provided derivatives having PPAR agonist activity. The derivatives include compounds and/or their pharmaceutically acceptable salts; the compounds having the formula (I) wherein A has the structure (II) or (III); X is chosen from —CH2—, —O—, —NH—, and —S—; Y is chosen from —O—, —NH—, and —S—; Z, which may be located in any position of substitution, is hydrogen or halogen; R1 and R2, which may be the same or different, are independently chosen from hydrogen and C1-C8 alkyl, or R1 and R2 together form a carbocyclic ring having from 4 to 6 carbon atoms; R3 is chosen from hydrogen and C1-C8 alkyl; R4, R5, and R6, which may be the same or different, are independently chosen from hydrogen and C1-C8 alkyl; and n is 1 to 6. Various embodiments and variants are provided.
    Type: Application
    Filed: September 6, 2005
    Publication date: May 15, 2008
    Applicants: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Saibal Kumar Das, Sunil Kumar Singh, Gurram Ranga Madhavan, Debnath Bhuniya, Javed Iqbal, Sudhir Kumar Sharma, Ranjan Chakrabarti
  • Patent number: 7365064
    Abstract: The present invention relates to novel antidiabetic, hypolipidemic, antiobesity and hypocholesterolemic compounds of formula (I) their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them, to a process for preparing such compounds. More particularly, the present invention relates to novel alkyl carboxylic acids of the general, their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them, to a process for preparing such compounds.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: April 29, 2008
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Debnath Bhuniya, Saibal Kumar Das, Gurram Ranga Madhavan, Javed Iqbal, Ranjan Chakrabarti
  • Patent number: 7348334
    Abstract: The present invention relates to novel hypolipidemic, antihyperglycemic compounds, their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them. More particularly, the present invention relates to novel ?-aryl-?-oxysubstituted alkylcarboxylic acids of the general formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: March 25, 2008
    Assignee: Dr. Reddy's Laboratories Limited
    Inventors: Javed Iqbal, Gurram Ranga Madhavan, Saibal Kumar Das, Debnath Bhunia, Ranjan Chakrabarti, Ramanujam Rajagopalan
  • Publication number: 20080045580
    Abstract: The present invention relates to novel isoxazole compounds of formula (I) having (PPAR) agonist activity, pharmaceutical compositions containing such compounds and methods for their use.
    Type: Application
    Filed: October 11, 2005
    Publication date: February 21, 2008
    Applicants: DR REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Gurram Madhavan, Javed Iqbal, Debnath Bhuniya, Saibal Das, Sudhir Sharma, Ranjan Chakrabarti
  • Patent number: 7314889
    Abstract: The present invention relates to novel antidiabetic, hypolipidemic, antiobesity and hypocholesterolemic compounds of formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: January 1, 2008
    Assignees: Dr. Reddy's Laboratories, Inc., Dr. Reddy's Laboratories Limited
    Inventors: Bhuniya Debnath, Saibal Kumar Das, Gurram Ranga Madhavan, Javed Iqbal, Ranjan Chakrabarti, Reeba Kannimel Vikramadithyan
  • Patent number: 7302679
    Abstract: One embodiment disclosed relates to a method of compiling a computer program from a plurality of files of source code. An inline analysis determines which call sites in the plurality of files to make inline. An inline transformation performs the inlining within currently opened files. The transformer dynamically determines the order of inlines independent of the analyzer by taking into account the disk input-output pressure during compilation. The resulting inline order minimizes the input and output of files from and to disk respectively by considering the inline affinity between files and maintains the best run-time performance by preserving the dependences between call sites. During the inline transformation, a determination of which files to open and close is made in dependence on an affinity weighting between the files.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: November 27, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dhruva Ranjan Chakrabarti, Shin-Ming Liu
  • Publication number: 20070142470
    Abstract: The present invention relates to novel antidiabetic, hypolipidemic, antiobesity and hypocholesterolemic compounds of formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them.
    Type: Application
    Filed: February 13, 2007
    Publication date: June 21, 2007
    Inventors: Bhuniya Debnath, Saibal Das, Gurram Madhaven, Javed Iqbal, Ranjan Chakrabarti, Reeba Vikramadithyan
  • Publication number: 20070043035
    Abstract: The present invention relates to novel hypolipidemic, antiobesity, hypocholesterolemic and antidiabetic compounds. More particularly, the present invention relates to novel alkyl carboxylic acids of the general formula (I), their stereoisomers, pharmaceutically acceptable salts thereof and pharmaceutical compositions containing them where all symbols are as defined in the description.
    Type: Application
    Filed: January 29, 2004
    Publication date: February 22, 2007
    Inventors: Ranga Gurram, Debnath Bhuniya, Saibal Das, Sudhir Sharma, Ranjan Chakrabarti, Javed Iqbal
  • Publication number: 20070015665
    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: Application
    Filed: June 30, 2006
    Publication date: January 18, 2007
    Inventors: Vijay Potluri, Saibal Das, Pradip Sasmal, Javed Iqbal, Parimal Misra, Ranjan Chakrabarti, Rashmi Talwar
  • Patent number: 7157581
    Abstract: The present invention relates to novel antiobesity and hypocholesterolemic compounds, their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them. More particularly, the present invention relates to novel ?-aryl-?-oxysubstituted alkylcarboxylic acids of the general formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: January 2, 2007
    Assignees: Dr. Reddy's Laboratories Ltd., Dr. Reddy's Laboratories, Inc.
    Inventors: Ranga Madhavan Gurram, Venkateswarlu Akella, Rajagopalan Ramanujam, Ranjan Chakrabarti, Parimal Misra, Vidya Bhushan Lohray, Braj Bhushan Lohray, Rao Bheema Paraselli
  • Patent number: 7119198
    Abstract: Novel ?-aryl-?-oxysubstituted alkylcarboxylic acids of the formula (I) and compositions containing them. The compounds have hypolipidemic, antihyperglycemic uses.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: October 10, 2006
    Assignees: Dr. Reddy's Research Foundation, Reddy-Cheminor, Inc.
    Inventors: Braj Bhushan Lohray, Vidya Bhushan Lohray, Ashok Channaveerappa Bajji, Shivaramayya Kalchar, Rajagopalan Ramanujam, Ranjan Chakrabarti