Patents by Inventor Sriram Rajagopal

Sriram Rajagopal 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: 7863446
    Abstract: Novel heterocyclic compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof are described. These compounds are useful in the treatment of immunological diseases, inflammation, pain disorder, rheumatoid arthritis; osteoporosis; multiple myeloma; uveititis; acute and chronic myelogenous leukemia; atherosclerosis; cancer; cachexia; ischemic-induced cell-damage; pancreatic beta cell destruction; osteoarthritis; rheumatoid spondylitis; gouty arthritis; inflammatory bowel disease; adult respiratory distress syndrome (ARDS); psoriasis; Crohn's disease; allergic rhinitis; ulcerative colitis; anaphylaxis; contact dermatitis; muscle degeneration; asthma; COPD; bone resorption diseases; multiple sclerosis; sepsis; septic shock; toxic shock syndrome and fever.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: January 4, 2011
    Assignee: Orchid Research Laboratories Limited
    Inventors: Akella Satya Surya Visweswara Srinivas, Ravikumar Tadiparthi, Ganapavarapu Veera Raghava Sharma, Sappanimuthu Thirunavukkarasu, Durairaj Peter Bhakiaraj, Virendra Kachhadia, Kilambi Narsimhan, Sathya Narayana Thara, Sriram Rajagopal, Gaddam Om Reddy, Sukunath Narayanan, Venkatesan Parameswaran, Venkatesan Janarthanam, Maruthikumar Narayanam, Sathyanarayana Gadde, Uma Ramachandran
  • Publication number: 20100329998
    Abstract: Described are novel heterocyclic compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof. These compounds are useful in the treatment of immunological diseases, inflammation, pain disorder, rheumatoid arthritis; osteoporosis; multiple myeloma; uveititis; acute and chronic myelogenous leukemia; atherosclerosis; cancer; cachexia; ischemic-induced cell damage; pancreatic beta cell destruction; osteoarthritis; rheumatoid spondylitis; gouty arthritis; inflammatory bowel disease; ARDS; psoriasis; Crohn's disease; allergic rhinitis; ulcerative colitis; anaphylaxis; contact dermatitis; muscle degeneration; asthma; COPD; bone resorption diseases; multiple sclerosis; sepsis; septic shock; toxic shock syndrome and fever. More particularly these compounds are useful as PDE4 inhibitors and are useful for treating PDE4 mediated diseases.
    Type: Application
    Filed: January 30, 2009
    Publication date: December 30, 2010
    Inventors: Visweswara Akella Satya Surya Srinivas, Ravikumar Tadiparthi, Ganapavarapu Veera Raghava Sharma, Thirunavukkarasu Sappanimuthu, Durairaj Peter Bhakiaraj, Virendra Kachhadia, Kilambi Narasimhan, Sathya Narayana Thara, Sriram Rajagopal, Om Gaddam, Nishikanth Reddy Gaddam, Sukunath Narayanan, Venkatesan Parameswaran, Venkatesan Janarthanam, Maruthikumar Narayanam, Sathyanarayana Gadde, Uma Ramachandran, Gopalan Balasubramanian, Narayanan Surendran, Shridhar Narayanan, Lolaknath Santosh Vishwakarma, Sanjeev Saxena
  • Publication number: 20100298402
    Abstract: Described are novel compounds of the formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, intermediates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites, and prodrugs thereof. These novel compounds can inhibit pSTAT3/IL-6 and are useful as a therapeutic or ameliorating agent for diseases that are involved in cellular growth such as malignant tumors, autoimmune diseases, skin diseases, infections, inflammation, etc.
    Type: Application
    Filed: November 4, 2008
    Publication date: November 25, 2010
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED
    Inventors: Sridharan Rajagopal, Thangapazham Selvakumar, Kuppusamy Bharathimohan, Virendra Kachhadia, Sriram Rajagopal, Rajendran Praveen, Ramachandran Balaji
  • Publication number: 20100291003
    Abstract: Novel compounds of the general formula (I), having histone deacetylase (HDAC) inhibiting enzymatic activity, their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, intermediates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof. The present invention more particularly provides novel compounds of the general formula (I). Also included is a method for treatment of cancer, psoriasis, proliferative conditions and conditions mediated by HDAC, in a mammal comprising administering an effective amount of a novel compound of formula (I).
    Type: Application
    Filed: October 21, 2008
    Publication date: November 18, 2010
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED
    Inventors: Sridharan Rajagopal, Virendra Kachhadia, Thanasekaran Ponpandian, Abdul Raheem Keeri, Karnambaram Anandhan, Sriram Rajagopal, Rajendran Praveen, Prabhu Daivasigamani
  • Publication number: 20100222379
    Abstract: Provided herein are novel, stilbene like compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, metabolites, prodrugs, solvates, pharmaceutically acceptable salts and compositions thereof. These compounds can inhibit HDACs and are useful as a therapeutic or ameliorating agent for diseases that are involved in cellular growth such as WO 2009/047615 A2 malignant tumors, autoimmune diseases, skin diseases, infections, inflammation, etc.
    Type: Application
    Filed: October 8, 2008
    Publication date: September 2, 2010
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED
    Inventors: Sridharan Rajagopal, Virendra Kachhadia, Thanasekaran Ponpandian, Abdul Raheem Keeri, Umamaheswari Mani, Suresh Rathinasamy, Praveen Rajendran, Kamaraj Mani, Balaji Ramachandran, Punthalir Narayanaswamy, Sriram Rajagopal
  • Patent number: 7786142
    Abstract: The present invention relates to novel heterocyclic compounds of the general formula (I), as IL-6 inhibitors, their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their hydrates, their solvates, their pharmaceutically acceptable salts and compositions, their metabolites and prodrugs thereof. The present invention more particularly provides novel heterocyclic compounds of the general formula (I).
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: August 31, 2010
    Assignee: Orchid Research Laboratories, Ltd.
    Inventors: Siripragada Mahender Rao, Akella Satya Surya Visweswara Srinvas, Shikha Rani, Gaddam Om Reddy, Sriram Rajagopal, Uma Ramachandran, Duddu Savaraiah Sharada, Rajagopalan Nirmala, Velaiah Sivasudar, Lakshmanan Manikandan, Ramachandran Balaji
  • Patent number: 7759350
    Abstract: The present invention relates to novel compounds of the general formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their hydrates, their solvates, their pharmaceutically acceptable salts and compositions, their metabolites and prodrugs thereof. The present invention more particularly relates to novel pyrimidine carboxamides of the general formula (I).
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: July 20, 2010
    Assignee: Orchid Research Laboratories Ltd.
    Inventors: Ravikumar Tadipartiii, Venkatesan Parameswaran, Rajib Barik, Gaddam Om Reddy, Pawan Aggarwal, Sappanimuthu Thirunavukkarasu, Sriram Rajagopal
  • Patent number: 7687488
    Abstract: Novel 2-substituted methyl penam derivatives include the formula (I), their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their solvates, their pharmaceutically acceptable salts, and pharmaceutical compositions containing them; wherein A=C or N; Het is a three- to seven-membered heterocyclic ring; R1 represents carboxylate anion, or —COOR4 where R4 represents hydrogen, carboxylic acid protecting group or a pharmaceutically acceptable salt; R2 and R3 may be same or different and independently represent hydrogen, halogen, amino, alkyl, protected amino, optionally substituted alkyl, alkenyl, alkynyl and the like; R represents substituted or unsubstituted alkyl, alkenyl, aryl, aralkyl, cycloalkyl, heterocyclyl or heterocyclylalkyl.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: March 30, 2010
    Assignee: Orchid Chemicals & Pharmaceuticals Ltd.
    Inventors: Senthilkumar Udayampalayam Palanisamy, Andrew Gnanaprakasam, Panchapakesan Ganapathy, Mukut Gohain, Venkatasubramanian Hariharan, Sriram Rajagopal, Maneesh Paul-Satyaseela, Shakti Singh Solanki, Sathishkumar Devarajan
  • Publication number: 20100063083
    Abstract: A 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diasterisomer is described which is a better inhibitor of topoisomerase I than either the diastereoisomeric mixture 5(RS)-(2?-hydroxyethoxy)-20(S)-camptothecin, or the 5(R)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer. Pharmaceutical compositions of the 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer are also described as are methods of using the compound for the inhibition of topoisomerase I and for the treatment of cancer.
    Type: Application
    Filed: October 12, 2009
    Publication date: March 11, 2010
    Applicant: Dr. Reddy's Laboratories LTD.
    Inventors: Venkateswarlu Akella, Shanavas Alikunju, Ajaya Kumar Reka, Ramesh Mullangi, Raju Sirisilla, Subrahmanyam Duvvuri, Sriram Rajagopal
  • Patent number: 7601733
    Abstract: A 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diasterisomer is described which is a better inhibitor of topoisomerase I than either the diastereoisomeric mixture 5(RS)-(2?-hydroxyethoxy)-20(S)-camptothecin, or the 5(R)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer. Pharmaceutical compositions of the 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer are also described as are methods of using the compound for the inhibition of topoisomerase I and for the treatment of cancer.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: October 13, 2009
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Venkateswarlu Akella, Shanavas Alikunju, Ajaya Kumar Reka, Ramesh Mullangi, Raju Sirisilla, Subrahmanyam Duvvuri, Sriram Rajagopal
  • Patent number: 7601732
    Abstract: A crystalline form of 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer of 5(RS)-(2?-hydroxyethoxy)-20(S)-camptothecin is described that is characterized by having an X-ray powder diffraction pattern comprising one or more peak intensities expressed in degrees 2? that are selected from the group consisting of 7.2±0.1, 9.4±0.1, 11.02±0.1, 12.00±0.1, 14.54±0.1, 15.2±0.1, 18.92±0.1, 21.86±0.1, 22.74±0.1 and 26.42±0.1. Methods of making and using the compound are also described.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: October 13, 2009
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Venkateswarlu Akella, Shanavas Alikunju, Ajaya Kumar Reka, Ramesh Mullangi, Raju Sirisilla, Subrahmanyam Duvvuri, Sriram Rajagopal
  • Publication number: 20090163521
    Abstract: The present invention relates to novel pyrazolopyrimidinones of the general formula (I), their derivatives, their analogs, their pharmaceutically acceptable salts and pharmaceutically acceptable compositions containing them. The present invention more particularly provides novel pyrazolopyrimidinones derivatives of the general formula (I).
    Type: Application
    Filed: June 28, 2006
    Publication date: June 25, 2009
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED
    Inventors: Ravikumar Tadiparthi, Simi Pushpan, Sriram Rajagopal, Rajib Barik
  • Publication number: 20090136431
    Abstract: The present invention relates to novel stilbene like compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts and compositions, metabolites and prodrugs thereof. The present invention more particularly provides novel stilbene like compounds of the general formula (I). Also included is a method for treatment of cancer, psoriasis, proliferative conditions and conditions mediated by HDAC, in a mammal comprising administering an effective amount of a novel compound of formula (I) as described above.
    Type: Application
    Filed: November 6, 2006
    Publication date: May 28, 2009
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED
    Inventors: Akella S.S.V. Srinivas, Urkalan K. Balan, Narayana S. Punthalir, Rama S. Velmurugan, Sriram Rajagopal, Gaddam O. Reddy, Virendra Kachhadia
  • Publication number: 20090093423
    Abstract: Novel 2-substituted methyl penam derivatives include the formula (I), their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their solvates, their pharmaceutically acceptable salts, and pharmaceutical compositions containing them; wherein A=C or N; Het is a three- to seven-membered heterocyclic ring; R1 represents carboxylate anion, or —COOR4 where R4 represents hydrogen, carboxylic acid protecting group or a pharmaceutically acceptable salt; R2 and R3 may be same or different and independently represent hydrogen, halogen, amino, alkyl, protected amino, optionally substituted alkyl, alkenyl, alkynyl and the like; R represents substituted or unsubstituted alkyl, alkenyl, aryl, aralkyl, cycloalkyl, heterocyclyl or heterocyclylalkyl.
    Type: Application
    Filed: July 11, 2007
    Publication date: April 9, 2009
    Applicant: Orchid Chemicals and Pharmaceuticals Limited
    Inventors: Senthilkumar UDAYAMPALAYAMPALANISAMY, Andrew GNANAPRAKASAM, Panchapakesan GANAPATHY, Mukut GOHAIN, Venkatasubramanian HARIHARAN, Sriram RAJAGOPAL, Maneesh PAUL-SATYASEELA, Shakti SINGH SOLANKI, Sathishkumar DEVARAJAN
  • Publication number: 20080221103
    Abstract: Provided herein are heterocyclic compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts and compositions, metabolites and prodrugs thereof, wherein R1, R2, R3, R4 and R5 are as described herein. Further described herein in particular are heterocyclic compounds of the formula (I) for treating various diseases. and disorders by administering in a patient one or more TNF-?, Thromboxane synthase, 5-LOX, and PDE4 inhibitors.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 11, 2008
    Applicant: ORCHID RESEARCH LABORATORIES LTD.
    Inventors: Ganapavarapu V.R. Sharma, Gaddam O. Reddy, Sriram Rajagopal, Uma Ramachandran, Sukunath Narayanan, Nagalakshmi Pichika, Venkatesh Nemmara Viswanathan, Lavanya Andiappan, Saravanan Thirunavukkarasu
  • Publication number: 20080207606
    Abstract: Novel heterocyclic compounds of the general formula (I), their derivatives, analogs, tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, pharmaceutically acceptable salts, pharmaceutical compositions, metabolites and prodrugs thereof are described. These compounds are useful in the treatment of immunological diseases, inflammation, pain disorder, rheumatoid arthritis; osteoporosis; multiple myeloma; uveititis; acute and chronic myelogenous leukemia; atherosclerosis; cancer; cachexia; ischemic-induced cell-damage; pancreatic beta cell destruction; osteoarthritis; rheumatoid spondylitis; gouty arthritis; inflammatory bowel disease; adult respiratory distress syndrome (ARDS); psoriasis; Crohn's disease; allergic rhinitis; ulcerative colitis; anaphylaxis; contact dermatitis; muscle degeneration; asthma; COPD; bone resorption diseases; multiple sclerosis; sepsis; septic shock; toxic shock syndrome and fever.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 28, 2008
    Applicant: ORCHID RESEARCH LABORATORIES LIMITED.
    Inventors: Akella Satya Surya Visweswara Srinivas, Ravikumar Tadiparthi, Ganapavarapu Veera Raghava Sharma, Sappanimuthu Thirunavukkarasu, Durairaj Peter Bhakiaraj, Virendra Kachhadia, Kilambi Narsimhan, Sathya Narayana Thara, Sriram Rajagopal, Gaddam Om Reddy, Sukunath Narayanan, Venkatesan Parameswaran, Venkatesan Janarthanam, Maruthikumar Narayanam, Sathyanarayana Gadde, Uma Ramachandran
  • Publication number: 20080076791
    Abstract: A 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diasterisomer is described which is a better inhibitor of topoisomerase I than either the diastereoisomeric mixture 5(RS)-(2?-hydroxyethoxy)-20(S)-camptothecin, or the 5(R)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer. Pharmaceutical compositions of the 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer are also described as are methods of using the compound for the inhibition of topoisomerase I and for the treatment of cancer.
    Type: Application
    Filed: May 24, 2007
    Publication date: March 27, 2008
    Applicants: DR.REDDY'S LABORATORIES LIMITED, DR.REDDY'S LABRATORIES, INC.
    Inventors: Venkateswarlu Akella, Shanavas Alikunju, Ajaya Reka, Ramesh Mullangi, Raju Sirisilla, Subrahmanyam Duvvuri, Sriram Rajagopal
  • Publication number: 20080076790
    Abstract: A crystalline form of 5(S)-(2?-hydroxyethoxy)-20(S)-camptothecin diastereoisomer of 5(RS)-(2?-hydroxyethoxy)-20(S)-camptothecin is described that is characterized by having an X-ray powder diffraction pattern comprising one or more peak intensities expressed in degrees 2? that are selected from the group consisting of 7.2±0.1, 9.4±0.1, 11.02±0.1, 12.00±0.1, 14.54±0.1, 15.2±0.1, 18.92±0.1, 21.86±0.1, 22.74±0.1 and 26.42±0.1. Methods of making and using the compound are also described.
    Type: Application
    Filed: May 24, 2007
    Publication date: March 27, 2008
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Venkateswarlu Akella, Shanavas Alikunju, Ajaya Reka, Ramesh Mullangi, Raju Sirisilla, Subrahmanyam Duvvuri, Sriram Rajagopal
  • Publication number: 20080015156
    Abstract: Novel 2-substituted methyl penam derivatives include the formula (I), their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their solvates, their pharmaceutically acceptable salts, and pharmaceutical compositions containing them; wherein A=C or N; Het is a three- to seven-membered heterocyclic ring; R1 represents carboxylate anion, or —COOR4 where R4 represents hydrogen, carboxylic acid protecting group or a pharmaceutically acceptable salt; R2 and R3 may be same or different and independently represent hydrogen, halogen, amino, alkyl, protected amino, optionally substituted alkyl, alkenyl, alkynyl and the like; R represents substituted or unsubstituted alkyl, alkenyl, aryl, aralkyl, cycloalkyl, heterocyclyl or heterocyclylalkyl.
    Type: Application
    Filed: July 11, 2007
    Publication date: January 17, 2008
    Applicant: ORCHID CHEMICALS & PHARMACEUTICALS LTD.
    Inventors: Senthilkumar Udayampalayam Palanisamy, Andrew Gnanaprakasam, Panchapakesan Ganapathy, Mukut Gohain, Venkatasubramanian Hariharan, Sriram Rajagopal, Maneesh Paul-Satyaseela, Shakti Solanki, Sathishkumar Devarajan
  • Publication number: 20070217326
    Abstract: Methods and systems for transmitting a modulated frame in a block transmission system and for decoding the modulated frame when received are provided. The block transmission system is a frequency reuse system. The transmission of a frame in a block transmission system includes modulating the frame using a modulation sequence to produce a modulated frame and transmitting the modulated frame. The modulation sequence is unknown to a receiver that will receive the modulated frame, and is representative of control information.
    Type: Application
    Filed: July 6, 2006
    Publication date: September 20, 2007
    Inventors: Sriram Rajagopal, Parikshith Sreebhashyam, Krishnamurthy Giridhar