Patents by Inventor Rajesh Kumar Kainthan

Rajesh Kumar Kainthan 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: 20200331959
    Abstract: The present disclosure relates generally to methods of preparing glycoconjugates containing a saccharide conjugated to a carrier protein by use of stable nitroxyl radical related agent/oxidant as an oxidizing agent, to immunogenic compositions comprising such glycoconjugates, and to methods for the use of such glycoconjugates and immunogenic compositions.
    Type: Application
    Filed: July 8, 2020
    Publication date: October 22, 2020
    Inventors: Mingming Han, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad
  • Publication number: 20200306357
    Abstract: The present invention relates to new immunogenic compositions comprising conjughated Streptococcus pneumoniae capsular saccharide antigens (glycoconjugates) and uses thereof. Immunogenic compositions of the present invention will typically comprise at least one glycoconjugate from a S. pneumoniae serotype not found in PREVNAR®, SYNFLORIX® and/or PREVNAR 13®. The invention also relates to vaccination of human subjects, in particular infants and elderly, against pneumococcal infections using said novel immunogenic compositions.
    Type: Application
    Filed: June 12, 2020
    Publication date: October 1, 2020
    Inventors: Emilio Anthony Emini, Wendy Jo Watson, Avvari Krishna Prasad, Mingming Han, Jin-Hwan Kim, Jianxin Gu, Yu-ying Yang, Rajesh Kumar Kainthan, David Cooper, Michael William Pride, Kathrin Ute Jansen
  • Patent number: 10745438
    Abstract: The present disclosure relates generally to methods of preparing glycoconjugates containing a saccharide conjugated to a carrier protein by use of stable nitroxyl radical related agent/oxidant as an oxidizing agent, to immunogenic compositions comprising such glycoconjugates, and to methods for the use of such glycoconjugates and immunogenic compositions.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: August 18, 2020
    Assignee: Pfizer Inc.
    Inventors: Mingming Han, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad
  • Publication number: 20200246475
    Abstract: The present invention relates generally to glycoconjugates comprising a saccharide covalently conjugated to a carrier protein through a spacer containing ((2-oxoethyl)thio)). In an aspect the invention provides oxo-eT linked glycoconjugates comprising a saccharide covalently conjugated to a carrier protein through a ((2-oxoethyl)thio) spacer having the formula (I): wherein: A is a group (C?X)m wherein X is S or O and m is 0 or 1; B is a bond, O, or CH2; and when m is 0, B can also be (C?O); R is a C2-C16 alkylene, C2-C16 heteroakylene, NH—C(?O)—C2-C16 alkylene, or NH—C(?O)—C2-C16 heteroakylene, wherein said alkylene and heteroalkylene are optionally substituted by 1, 2 or 3 groups independently selected from COOR? where R? is selected from H, methyl, ethyl or propyl. The invention further relates to immunogenic compositions comprising such glycoconjugates, and to methods for the preparation and use of such glycoconjugates and immunogenic compositions.
    Type: Application
    Filed: April 20, 2020
    Publication date: August 6, 2020
    Inventors: Jianxin Gu, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad, Yu-Ying Yang
  • Patent number: 10668164
    Abstract: The present invention relates generally to glycoconjugates comprising a saccharide covalently conjugated to a carrier protein through a spacer containing ((2-oxoethyl)thio)). In an aspect the invention provides oxo-eT linked glycoconjugates comprising a saccharide covalently conjugated to a carrier protein through a ((2-oxoethyl)thio) spacer having the formula (I): (I) wherein: A is a group (C?X)m wherein X is S or O and m is 0 or 1; B is a bond, O, or CH2; and when m is 0, B can also be (C?O); R is a C2-C16 alkylene, C2-C16 heteroalkylene, NH—C(?O)—C2-C16 alkylene, or NH—C(?O)—C2-C16 heteroalkylene, wherein said alkylene and heteroalkylene are optionally substituted by 1, 2 or 3 groups independently selected from COOR? where R? is selected from H, methyl, ethyl or propyl. The invention further relates to immunogenic compositions comprising such glycoconjugates, and to methods for the preparation and use of such glycoconjugates and immunogenic compositions.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: June 2, 2020
    Assignee: Pfizer Inc.
    Inventors: Jianxin Gu, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad, Yu-Ying Yang
  • Patent number: 10525131
    Abstract: Herein are provided derivatized hyperbranched polyglycerols (“dHPGs”). The dHPG comprises a core comprising a hyperbranched polyglycerol derivatized with C1C20 alkyl chains and a shell comprising at least one hydrophilic substituent bound to hydroxyl groups of the core, wherein the hyperbranched polyglycerol comprises from about 1 to about 200 moles of the at least one hydrophilic substituent. The dHPGs are for use as agents for the delivery of a drug or other biologically active moiety to the urinary tract, the digestive tract, the airways, the vaginal cavity and cervix and the peritoneal cavity to treat indications such as cancer, which may be useful in the treatment of or the manufacture of a medicament, in the preparation, of a pharmaceutical composition for the treatment of cancer, as a pre-treatment or co-treatment to improve drug uptake in a tissue. Furthermore, there are provided methods of making dHPGs.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: January 7, 2020
    Assignees: The University of British Columbia, Centre for Drug Research and Development
    Inventors: Helen M. Burt, Donald E. Brooks, Jayachandran N. Kizhakkedathu, Richard Liggins, Dechi Guan, Lu Ye, Clement Mugabe, Alan So, Martin E. Gleave, John K. Jackson, Rajesh Kumar Kainthan
  • Publication number: 20190330265
    Abstract: The present disclosure relates generally to methods of preparing glycoconjugates containing a saccharide conjugated to a carrier protein by use of stable nitroxyl radical related agent/oxidant as an oxidizing agent, to immunogenic compositions comprising such glycoconjugates, and to methods for the use of such glycoconjugates and immunogenic compositions.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Inventors: Mingming Han, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad
  • Patent number: 10392420
    Abstract: The present disclosure relates generally to methods of preparing glycoconjugates containing a saccharide conjugated to a carrier protein by use of stable nitroxyl radical related agent/oxidant as an oxidizing agent, to immunogenic compositions comprising such glycoconjugates, and to methods for the use of such glycoconjugates and immunogenic compositions.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: August 27, 2019
    Assignee: Pfizer Inc.
    Inventors: Mingming Han, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad
  • Publication number: 20190201528
    Abstract: Herein are provided derivatized hyperbranched polyglycerols (“dHPGs”). The dHPG comprises a core comprising a hyperbranched polyglycerol derivatized with C1C20 alkyl chains and a shell comprising at least one hydrophilic substituent bound to hydroxyl groups of the core, wherein the hyperbranched polyglycerol comprises from about 1 to about 200 moles of the at least one hydrophilic substituent. The dHPGs are for use as agents for the delivery of a drug or other biologically active moiety to the urinary tract, the digestive tract, the airways, the vaginal cavity and cervix and the peritoneal cavity to treat indications such as cancer, which may be useful in the treatment of or the manufacture of a medicament, in the preparation, of a pharmaceutical composition for the treatment of cancer, as a pre-treatment or co-treatment to improve drug uptake in a tissue. Furthermore, there are provided methods of making dHPGs.
    Type: Application
    Filed: July 26, 2018
    Publication date: July 4, 2019
    Inventors: Helen M. Burt, Donald E. Brooks, Jayachandran N. Kizhakkedathu, Richard Liggins, Dechi Guan, Lu Ye, Clement Mugabe, Alan So, Martin E. Gleave, John K. Jackson, Rajesh Kumar Kainthan
  • Publication number: 20190142922
    Abstract: The invention relates to immunogenic polysaccharide-protein conjugates comprising a capsular polysaccharide (CP) from Streptococcus agalactiae, commonly referred to as group B streptococcus (GBS), and a carrier protein, wherein the CP is selected from the group consisting of serotypes Ia, Ib, II, III, IV, V, VI, VII, VIII, and IX, and wherein the CP has a sialic acid level of greater than about 60%. The invention also relates to methods of making the conjugates and immunogenic compositions comprising the conjugates. The invention also relates to immunogenic compositions comprising polysaccharide-protein conjugates, wherein the conjugates comprise a CP from GBS serotype IV and at least one additional serotype. The invention further relates to methods for inducing an immune response in subjects against GBS and/or for reducing or preventing invasive GBS disease in subjects using the compositions disclosed herein. The resulting antibodies can be used to treat or prevent GBS infection via passive immunotherapy.
    Type: Application
    Filed: January 11, 2019
    Publication date: May 16, 2019
    Inventors: Annaliesa Sybil Anderson, Amardeep Singh Bhupender Bhalla, Robert G.K. Donald, Jianxin Gu, Kathrin Ute Jansen, Rajesh Kumar Kainthan, Lakshmi Khandke, Jin-Hwan Kim, Paul Liberator, Avvari Krishna Prasad, Mark Edward Ruppen, Ingrid Lea Scully, Suddham Singh, Cindy Xudong Yang
  • Publication number: 20190091281
    Abstract: Pharmaceutical compositions having enhanced active component permeation properties are described.
    Type: Application
    Filed: September 26, 2018
    Publication date: March 28, 2019
    Applicant: AQUESTIVE THERAPEUTICS, INC.
    Inventors: Stephen Paul Wargacki, Rajesh Kumar Kainthan, Alexander Mark Schobel
  • Patent number: 10226525
    Abstract: The invention relates to immunogenic polysaccharide-protein conjugates comprising a capsular polysaccharide (CP) from Streptococcus agalactiae, commonly referred to as group B streptococcus (GBS), and a carrier protein, wherein the CP is selected from the group consisting of serotypes Ia, Ib, II, III, IV, V, VI, VII, VIII, and IX, and wherein the CP has a sialic acid level of greater than about 60%. The invention also relates to methods of making the conjugates and immunogenic compositions comprising the conjugates. The invention also relates to immunogenic compositions comprising polysaccharide-protein conjugates, wherein the conjugates comprise a CP from GBS serotype IV and at least one additional serotype. The invention further relates to methods for inducing an immune response in subjects against GBS and/or for reducing or preventing invasive GBS disease in subjects using the compositions disclosed herein. The resulting antibodies can be used to treat or prevent GBS infection via passive immunotherapy.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: March 12, 2019
    Assignee: Pfizer Inc.
    Inventors: Annaliesa Sybil Anderson, Amardeep Singh Bhupender Bhalla, Robert G. K. Donald, Jianxin Gu, Kathrin Ute Jansen, Rajesh Kumar Kainthan, Lakshmi Khandke, Jin-Hwan Kim, Paul Liberator, Avvari Krishna Prasad, Mark Edward Ruppen, Ingrid Lea Scully, Suddham Singh, Cindy Xudong Yang
  • Publication number: 20190000953
    Abstract: The invention relates to activated Streptococcus pneumoniae serotype 10A, 22F or 33F polysaccharides and processes for their preparation. The invention also relates to immunogenic conjugates comprising Streptococcus pneumoniae serotype 10A, 22F or 33F polysaccharides covalently linked to a carrier protein, processes for their preparation and immunogenic compositions and vaccines comprising them.
    Type: Application
    Filed: September 17, 2018
    Publication date: January 3, 2019
    Inventors: Jianxin Gu, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad, Yu-Ying Yang
  • Publication number: 20180369384
    Abstract: The present invention is based, in part, upon the discovery of charged lipids that provide advantages when used in lipid particles for the in vivo delivery of a therapeutic agent. As such, described herein are compounds useful for delivering a nucleic acid to a cell.
    Type: Application
    Filed: May 16, 2017
    Publication date: December 27, 2018
    Applicant: Arbutus Biopharma Corporation
    Inventors: Muthiah Manoharan, Kallanthottathil G. Rajeev, Muthusamy Jayaraman, David Butler, Mamta Kapoor, Rajesh Kumar Kainthan
  • Patent number: 10105431
    Abstract: The invention relates to activated Streptococcus pneumoniae serotype 10A, 22F or 33F polysaccharides and processes for their preparation. The invention also relates to immunogenic conjugates comprising Streptococcus pneumoniae serotype 10A, 22F or 33F polysaccharides covalently linked to a carrier protein, processes for their preparation and immunogenic compositions and vaccines comprising them.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: October 23, 2018
    Assignee: Pfizer Inc.
    Inventors: Jianxin Gu, Rajesh Kumar Kainthan, Jin-Hwan Kim, Avvari Krishna Prasad, Yu-Ying Yang
  • Patent number: 10071160
    Abstract: Herein are provided derivatized hyperbranched polyglycerols (“dHPGs”). The dHPG comprises a core comprising a hyperbranched polyglycerol derivatized with C1C20 alkyl chains and a shell comprising at least one hydrophilic substituent bound to hydroxyl groups of the core, wherein the hyperbranched polyglycerol comprises from about 1 to about 200 moles of the at least one hydrophilic substituent. The dHPGs are for use as agents for the delivery of a drug or other biologically active moiety to the urinary tract, the digestive tract, the airways, the vaginal cavity and cervix and the peritoneal cavity to treat indications such as cancer, which may be useful in the treatment of or the manufacture of a medicament, in the preparation, of a pharmaceutical composition for the treatment of cancer, as a pre-treatment or co-treatment to improve drug uptake in a tissue. Furthermore, there are provided methods of making dHPGs.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: September 11, 2018
    Assignees: The University of British Columbia, Centre for Drug Research and Development
    Inventors: Helen M. Burt, Donald E. Brooks, Jayachandran N. Kizhakkedathu, Richard Liggins, Dechi Guan, Lu Ye, Clement Mugabe, Alan So, Martin E. Gleave, John K. Jackson, Rajesh Kumar Kainthan
  • Publication number: 20180099039
    Abstract: The present invention relates to new immunogenic compositions comprising conjugated Streptococcus pneumoniae capsular saccharide antigens (glycoconjugates) and uses thereof. Immunogenic compositions of the present invention will typically comprise at least one glycoconjugate from a S. pneumoniae serotype not found in PREVNAR®, SYNFLORIX® and/or PREVNAR 13®. The invention also relates to vaccination of human subjects, in particular infants and elderly, against pneumoccocal infections using said novel immunogenic compositions.
    Type: Application
    Filed: October 6, 2016
    Publication date: April 12, 2018
    Inventors: Emilio Anthony Emini, Wendy Jo Watson, Avvari Krishna Prasad, Mingming Han, Jin-Hwan Kim, Jianxin Gu, Yu-ying Yang, Rajesh Kumar Kainthan, David Cooper, Michael William Pride, Kathrin Ute Jansen
  • Publication number: 20170319696
    Abstract: Herein are provided derivatized hyperbranched polyglycerols (“dHPGs”). The dHPG comprises a core comprising a hyperbranched polyglycerol derivatized with C1C20 alkyl chains and a shell comprising at least one hydrophilic substituent bound to hydroxyl groups of the core, wherein the hyperbranched polyglycerol comprises from about 1 to about 200 moles of the at least one hydrophilic substituent. The dHPGs are for use as agents for the delivery of a drug or other biologically active moiety to the urinary tract, the digestive tract, the airways, the vaginal cavity and cervix and the peritoneal cavity to treat indications such as cancer, which may be useful in the treatment of or the manufacture of a medicament, in the preparation, of a pharmaceutical composition for the treatment of cancer, as a pre-treatment or co-treatment to improve drug uptake in a tissue. Furthermore, there are provided methods of making dHPGs.
    Type: Application
    Filed: December 22, 2016
    Publication date: November 9, 2017
    Inventors: Helen M. Burt, Donald E. Brooks, Jayachandran N. Kizhakkedathu, Richard Liggins, Dechi Guan, Lu Ye, Clement Mugabe, Alan So, Martin E. Gleave, John K. Jackson, Rajesh Kumar Kainthan
  • Patent number: 9789056
    Abstract: This invention provides the use of a polymer comprising a hyperbranched polyether polyol such as hyperbranched polyglycerol as a serum albumin substitute. Also provided are high molecular weight hyperbranched polyglycerol polymers suitable for a variety of medical and non-medical uses including methods for making such high molecular weight polymers.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: October 17, 2017
    Assignee: The University of British Columbia
    Inventors: Donald E. Brooks, Jayachandran N. Kizhakkedathu, Rajesh Kumar Kainthan
  • Patent number: 9687550
    Abstract: The present invention is based, in part, upon the discovery of charged lipids that provide advantages when used in lipid particles for the in vivo delivery of a therapeutic agent. As such, described herein are compounds useful for delivering a nucleic acid to a cell.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: June 27, 2017
    Assignee: Arbutus Biopharma Corporation
    Inventors: Muthiah Manoharan, Kallanthottathil G. Rajeev, Muthusamy Jayaraman, David Butler, Mamta Kapoor, Rajesh Kumar Kainthan