Patents by Inventor Ramakrishnan Chidambaram

Ramakrishnan Chidambaram 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: 20220144881
    Abstract: The present disclosure provides compounds and processes for the preparation of hypomethylating agents, including guadecitabine and salts thereof. The present disclosure also provides solid forms of guadecitabine sodium, including polymorphs that can exhibit decreased hygroscopicity and increased stability relative to other solid forms.
    Type: Application
    Filed: May 13, 2021
    Publication date: May 12, 2022
    Inventors: Masahiro MIYAKE, Masahiro SOTA, Shin OGASAWARA, Nao KOSEKI, Neil G. ANDERSEN, Ramakrishnan CHIDAMBARAM, Nipun DAVAR
  • Publication number: 20220000906
    Abstract: The present invention is directed to crosslinked cation exchange polymers comprising a fluoro group and an acid group, pharmaceutical compositions of these polymers, compositions of a linear polyol and a salt of such polymer. Crosslinked cation exchange polymers having beneficial physical properties, including combinations of particle size, particle shape, particle size distribution, viscosity, yield stress, compressibility, surface morphology, and/or swelling ratio are also described. These polymers and compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: May 18, 2021
    Publication date: January 6, 2022
    Inventors: Paul Mansky, Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Ramakrishnan Chidambaram, Jonathan Mills, Werner Strüver
  • Publication number: 20210228620
    Abstract: The present invention is directed to compositions of a linear polyol and a salt of a crosslinked cation exchange polymer comprising a fluoro group and an acid group. These compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 29, 2021
    Inventors: Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Ramakrishnan Chidambaram, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Jonathan Mills, Werner Strüver
  • Publication number: 20200289550
    Abstract: The present invention is directed to crosslinked cation exchange polymers comprising a fluoro group and an acid group, pharmaceutical compositions of these polymers, compositions of a linear polyol and a salt of such polymer. Crosslinked cation exchange polymers having beneficial physical properties, including combinations of particle size, particle shape, particle size distribution, viscosity, yield stress, compressibility, surface morphology, and/or swelling ratio are also described. These polymers and compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: November 1, 2019
    Publication date: September 17, 2020
    Inventors: Paul Mansky, Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Ramakrishnan Chidambaram, Jonathan Mills, Werner Strüver
  • Publication number: 20180125881
    Abstract: The present invention is directed to compositions of a linear polyol and a salt of a crosslinked cation exchange polymer comprising a fluoro group and an acid group. These compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: January 9, 2018
    Publication date: May 10, 2018
    Inventors: Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Ramakrishnan Chidambaram, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Jonathan Mills, Werner Strüver
  • Publication number: 20170165292
    Abstract: The present invention is directed to crosslinked cation exchange polymers comprising a fluoro group and an acid group, pharmaceutical compositions of these polymers, compositions of a linear polyol and a salt of such polymer. Crosslinked cation exchange polymers having beneficial physical properties, including combinations of particle size, particle shape, particle size distribution, viscosity, yield stress, compressibility, surface morphology, and/or swelling ratio are also described. These polymers and compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: February 27, 2017
    Publication date: June 15, 2017
    Inventors: Paul Mansky, Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Ramakrishnan Chidambaram, Jonathan Mills, Werner Strüver
  • Publication number: 20140179711
    Abstract: The invention relates to processes for preparing compounds having the formula, and crystalline forms thereof, wherein Ar is aryl or heteroaryl, L is an optional alkylene linker, and R2, R3, R4, and R5, are as defined in the specification herein, which compounds are useful as kinase inhibitors, in particular, inhibitors of protein tyrosine kinase and p38 kinase.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Applicant: Bristol-Myers Squibb Company
    Inventors: Jean Lajeunesse, John D. DiMarco, Michael Galella, Ramakrishnan Chidambaram
  • Patent number: 8680103
    Abstract: The invention relates to a pharmaceutical composition of a crystalline monohydrate of the compound of formula (IV) wherein the crystalline monohydrate is characterized by certain unit cell parameters.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 25, 2014
    Assignee: Bristol-Myers Squibb Company
    Inventors: Jean Lajeunesse, John D. DiMarco, Michael Galella, Ramakrishnan Chidambaram
  • Patent number: 8337824
    Abstract: The present invention is directed to compositions of a linear polyol and a salt of a crosslinked cation exchange polymer comprising a fluoro group and an acid group. These compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Grant
    Filed: August 22, 2009
    Date of Patent: December 25, 2012
    Assignee: Relypsa, Inc.
    Inventors: Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Ramakrishnan Chidambaram, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Jonathan Mills, Werner Strüver
  • Publication number: 20120302750
    Abstract: The invention relates to processes for preparing compounds having the formula, and crystalline forms thereof, wherein Ar is aryl or heteroaryl, L is an optional alkylene linker, and R2, R3, R4, and R5, are as defined in the specification herein, which compounds are useful as kinase inhibitors, in particular, inhibitors of protein tyrosine kinase and p38 kinase.
    Type: Application
    Filed: July 31, 2012
    Publication date: November 29, 2012
    Inventors: Jean Lajeunesse, John D. DiMarco, Michael Galella, Ramakrishnan Chidambaram
  • Patent number: 8242270
    Abstract: The invention relates to processes for preparing compounds having the formula, and crystalline forms thereof, wherein Ar is aryl or heteroaryl, L is an optional alkylene linker, and R2, R3, R4, and R5, are as defined in the specification herein, which compounds are useful as kinase inhibitors, in particular, inhibitors of protein tyrosine kinase and p38 kinase.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: August 14, 2012
    Assignee: Bristol-Myers Squibb Company
    Inventors: Jean Lajeunesse, John D. DiMarco, Michael Galella, Ramakrishnan Chidambaram
  • Publication number: 20110236340
    Abstract: The present invention is directed to crosslinked cation exchange polymers comprising a fluoro group and an acid group, pharmaceutical compositions of these polymers, compositions of a linear polyol and a salt of such polymer. Crosslinked cation exchange polymers having beneficial physical properties, including combinations of particle size, particle shape, particle size distribution, viscosity, yield stress, compressibility, surface morphology, and/or swelling ratio are also described. These polymers and compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: August 22, 2009
    Publication date: September 29, 2011
    Applicant: Relypsa, Inc.
    Inventors: Paul Mansky, Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Ramakrishnan Chidambaram, Jonathan Mills, Werner Strüver
  • Patent number: 7968718
    Abstract: A process is provided for preparing triazole substituted azaindoleoxoacetic piperazine derivative. Novel intermediates produced in the above process, and novel N-1 and amorphous forms of a 1,2,3-triazole substituted azaindoloxoacetic piperazine derivatives and processes for producing such novel forms are also provided.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: June 28, 2011
    Assignee: Bristol-Myers Squibb Company
    Inventors: Nachimuthu Soundararajan, Yuping Qiu, Wenhao Hu, David R. Kronenthal, Pierre Sirard, Jean Lajeunesse, Robert Droghini, Ramakrishnan Chidambaram, Xinhua Qian, Kenneth J. Natalie, Shawn K. Pack, Nathan Reising, Erqing Tang, Michael G. Fakes, Qi Gao, Feng Qian, Blisse J. Vakkalagadda, Chiajen Lai, Shan-Ming Kuang
  • Patent number: 7956214
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: June 7, 2011
    Assignees: Karo Bio AB, Bristol-Myers Squibb Company
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond E. Weaver, Jurong Yu, Arun Ghosh
  • Publication number: 20100111891
    Abstract: The present invention is directed to compositions of a linear polyol and a salt of a crosslinked cation exchange polymer comprising a fluoro group and an acid group. These compositions are useful to bind potassium in the gastrointestinal tract.
    Type: Application
    Filed: August 22, 2009
    Publication date: May 6, 2010
    Applicant: RELYPSA, INC.
    Inventors: Detlef Albrecht, Michael Burdick, Han-Ting Chang, Dominique Charmot, Ramakrishnan Chidambaram, Eric Connor, Sherin Halfon, I-Zu Huang, Mingjun Liu, Jonathan Mills, Werner Strüver
  • Publication number: 20100076191
    Abstract: A process is provided for preparing triazole substituted azaindoleoxoacetic piperazine derivative. Novel intermediates produced in the above process, and novel N-1 and amorphous forms of a 1,2,3-triazole substituted azaindoloxoacetic piperazine derivatives and processes for producing such novel forms are also provided.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 25, 2010
    Inventors: NACHIMUTHU SOUNDARARAJAN, Yuping Qiu, Wenhao Hu, David R. Kronenthal, Pierre Sirard, Jean Lajeunesse, Robert Droghini, Ramakrishnan Chidambaram, Xinhua Qian, Kenneth J. Natalie, Shawn K. Pack, Nathan Reising, Erqing Tang, Michael G. Fakes, Qi Gao, Feng Qian, Blisse J. Vakkalagadda, Chiajen Lai, Shan-Ming Kuang
  • Publication number: 20090326263
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 31, 2009
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond E. Weaver, Jurong Yu, Arun Ghosh
  • Patent number: 7601715
    Abstract: A process is provided for preparing triazole substituted azaindoleoxoacetic piperazine derivative. Novel intermediates produced in the above process, and novel N-1 and amorphous forms of a 1,2,3-triazole substituted azaindoloxoacetic piperazine derivatives and processes for producing such novel forms are also provided.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: October 13, 2009
    Assignee: Bristol-Myers Squibb Company
    Inventors: Nachimuthu Soundararajan, Yuping Qiu, Wenhao Hu, David R. Kronenthal, Pierre Sirard, Jean Lajeunesse, Robert Droghini, Ramakrishnan Chidambaram, Xinhua Qian, Kenneth J. Natalie, Shawn K. Pack, Nathan Reising, Erqing Tang, Michael G. Fakes, Qi Gao, Feng Qian, Blisse J. Vakkalagadda, Chiajen Lai, Shan-Ming Kuang
  • Publication number: 20090239951
    Abstract: The invention relates to novel crystalline forms of 3-[[3,5-dibromo-4-[4-hydroxy-3-(1-methylethyl)-phenoxy]-phenyl]-amino]-3-oxopropanoic acid, said crystalline forms being characterised by a powder X-ray diffraction pattern having major peaks at either 2?=16.1±0.2, 20.1±0.2, 20.7±0.2, and 24.2+0.2; or 2?=9.0±0.2, 14.7±0.2, 19.6±0.2, 21.6±0.2, and 24.3+0.2.
    Type: Application
    Filed: March 27, 2007
    Publication date: September 24, 2009
    Inventors: Ramakrishnan Chidambaram, Neeraj Garg, Ake Rasmuson, Sandra Gracin
  • Publication number: 20090149650
    Abstract: The invention relates to processes for preparing compounds having the formula, and crystalline forms thereof, wherein Ar is aryl or heteroaryl, L is an optional alkylene linker, and R2, R3, R4, and R5, are as defined in the specification herein, which compounds are useful as kinase inhibitors, in particular, inhibitors of protein tyrosine kinase and p38 kinase.
    Type: Application
    Filed: December 23, 2008
    Publication date: June 11, 2009
    Inventors: Bang-Chi Chen, Roberto Droghini, Jean Lajeunesse, John D. Dimarco, Michael Galella, Ramakrishnan Chidambaram