Patents by Inventor A. Krishna Prasad
A. Krishna Prasad 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).
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Publication number: 20240408221Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 66, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Methods for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 19A polysaccharide are also provided in which the serotype 19A polysaccharide is co-lyophilized with a carrier protein and conjugation is carried out in dimethyl sulfoxide (DMSO) via a reductive amination mechanism.Type: ApplicationFiled: February 14, 2024Publication date: December 12, 2024Inventor: A. Krishna Prasad
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Patent number: 11969474Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Methods for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 19A polysaccharide are also provided in which the serotype 19A polysaccharide is co-lyophilized with a carrier protein and conjugation is carried out in dimethyl sulfoxide (DMSO) via a reductive amination mechanism.Type: GrantFiled: May 7, 2018Date of Patent: April 30, 2024Assignee: Wyeth LLCInventor: A. Krishna Prasad
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Publication number: 20180256739Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Methods for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 19A polysaccharide are also provided in which the serotype 19A polysaccharide is co-lyophilized with a carrier protein and conjugation is carried out in dimethyl sulfoxide (DMSO) via a reductive amination mechanism.Type: ApplicationFiled: May 7, 2018Publication date: September 13, 2018Inventor: A. Krishna Prasad
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Patent number: 9981045Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Methods for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 19A polysaccharide are also provided in which the serotype 19A polysaccharide is co-lyophilized with a carrier protein and conjugation is carried out in dimethyl sulfoxide (DMSO) via a reductive amination mechanism.Type: GrantFiled: April 24, 2015Date of Patent: May 29, 2018Assignee: Wyeth LLCInventor: A. Krishna Prasad
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Patent number: 9623100Abstract: The present invention relates to immunogenic conjugates comprising S. aureus serotype 5 and 8 capsular polysaccharides conjugated to carrier proteins and methods for their preparation and use. Methods for making the immunogenic conjugates of the invention involve covalent conjugation of the capsular polysaccharides with the carrier proteins using conjugation chemistry involving either 1,1-carbonyl-di-1,2,4-triazole (CDT) or 3-(2-pyridyldithio)-propionyl hydrazide (PDPH).Type: GrantFiled: July 28, 2015Date of Patent: April 18, 2017Assignee: Wyeth LLCInventors: Stephen John Freese, Annaliesa Anderson, Viliam Pavliak, Kathrin Ute Jansen, Ingrid Lea Scully, Tracy Dee Scott, Jasdeep Singh Nanra, A. Krishna Prasad, Bruce Arthur Green
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Patent number: 9517274Abstract: The invention provides eTEC linked glycoconjugates comprising a saccharide covalently conjugated to a carrier protein through a (2-((2-oxoethyl)thio)ethyl)carbamate (eTEC) spacer, immunogenic compositions comprising such glycoconjugates, and methods for the preparation and use of such glycoconjugates and immunogenic compositions.Type: GrantFiled: August 12, 2013Date of Patent: December 13, 2016Assignee: Pfizer Inc.Inventors: Jianxin Gu, Jin-hwan Kim, A. Krishna Prasad, Yu-ying Yang
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Patent number: 9480736Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Also described is a method for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 1 polysaccharide covalently linked to a carrier protein, the method including partial de-O-acetylation of the polysaccharide by mild hydrolysis in an alkaline pH buffer.Type: GrantFiled: October 21, 2014Date of Patent: November 1, 2016Assignee: Wyeth LLCInventors: William P. Hausdorff, George Rainer Siber, Peter R. Paradiso, A. Krishna Prasad
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Publication number: 20160022798Abstract: The present invention relates to immunogenic conjugates comprising S. auerus serotype 5 and 8 capsular polysaccharides conjugated to carrier proteins and methods for their preparation and use. Methods for making the immunogenic conjugates of the invention involve covalent conjugation of the capsular polysaccharides with the carrier proteins using conjugation chemistry involving either 1,1-carboyl-di-1,2,4-triazole (CDT) or 3-(2-pyridyldithio)-propionyl hydrazide (PDPH).Type: ApplicationFiled: July 28, 2015Publication date: January 28, 2016Inventors: Stephen John Freese, Annaliesa Anderson, Viliam Pavliak, Kathrin Ute Jansen, Ingrid Lea Scully, Tracy Dee Scott, Jasdeep Singh Nanra, A. Krishna Prasad, Bruce Arthur Green
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Patent number: 9125951Abstract: The present invention relates to immunogenic conjugates comprising S. aureus serotype 5 and 8 capsular polysaccharides conjugated to carrier proteins and methods for their preparation and use. Methods for making the immunogenic conjugates of the invention involve covalent conjugation of the capsular polysaccharides with the carrier proteins using conjugation chemistry involving either 1,1-carboyl-di-1,2,4-triazole (CDT) or 3-(2-pyridyldithio)-propionyl hydrazide (PDPH).Type: GrantFiled: June 22, 2010Date of Patent: September 8, 2015Assignee: Wyeth LLCInventors: Stephen John Freese, Annaliesa Anderson, Viliam Pavliak, Kathrin Ute Jansen, Ingrid Lea Scully, Tracy Dee Scott, Jasdeep Singh Nanra, A. Krishna Prasad, Bruce Arthur Green
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Patent number: 9125847Abstract: The present invention is directed to methods of producing conjugates of A? peptide immunogens with protein/polypeptide carrier molecules, which are useful as immunogens, wherein peptide immunogens are conjugated to protein carriers via activated functional groups on amino acid residues of the carrier or of the optionally attached linker molecule, and wherein any unconjugated reactive functional groups on amino acid residues are inactivated via capping, thus retaining the immunological functionality of the carrier molecule, but reducing the propensity for undesirable reactions that could render the conjugate less safe or effective. Furthermore, the invention also relates to such immunogenic products and immunogenic compositions containing such immunogenic products made by such methods.Type: GrantFiled: February 14, 2012Date of Patent: September 8, 2015Assignees: Janssen Sciences Ireland UC, Wyeth LLCInventors: Rasappa G. Arumugham, A. Krishna Prasad, Michael Hagen
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Publication number: 20150231270Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Methods for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 19A polysaccharide are also provided in which the serotype 19A polysaccharide is co-lyophilized with a carrier protein and conjugation is carried out in dimethyl sulfoxide (DMSO) via a reductive amination mechanism.Type: ApplicationFiled: April 24, 2015Publication date: August 20, 2015Inventor: A. Krishna Prasad
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Publication number: 20150216996Abstract: The invention provides eTEC linked glycoconjugates comprising a saccharide covalently conjugated to a carrier protein through a (2-((2-oxoethyl)thio)ethyl)carbamate (eTEC) spacer, immunogenic compositions comprising such glycoconjugates, and methods for the preparation and use of such glycoconjugates and immunogenic compositions.Type: ApplicationFiled: August 12, 2013Publication date: August 6, 2015Inventors: Jianxin Gu, Jin-hwan Kim, A. Krishna Prasad, Yu-ying Yang
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Patent number: 9095536Abstract: The present invention is directed to methods of producing conjugates of A? peptide immunogens with protein/polypeptide carrier molecules, which are useful as immunogens, wherein peptide immunogens are conjugated to protein carriers via activated functional groups on amino acid residues of the carrier or of the optionally attached linker molecule, and wherein any unconjugated reactive functional groups on amino acid residues are inactivated via capping, thus retaining the immunological functionality of the carrier molecule, but reducing the propensity for undesirable reactions that could render the conjugate less safe or effective. Furthermore, the invention also relates to such immunogenic products and immunogenic compositions containing such immunogenic products made by such methods.Type: GrantFiled: August 20, 2007Date of Patent: August 4, 2015Assignees: Janssen Sciences Ireland UC, Wyeth LLCInventors: Rasappa G. Arumugham, A. Krishna Prasad, Michael Hagen
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Patent number: 9089510Abstract: The present invention is directed to methods of producing conjugates of A? peptide immunogens with protein/polypeptide carrier molecules, which are useful as immunogens, wherein peptide immunogens are conjugated to protein carriers via activated functional groups on amino acid residues of the carrier or of the optionally attached linker molecule, and wherein any unconjugated reactive functional groups on amino acid residues are inactivated via capping, thus retaining the immunological functionality of the carrier molecule, but reducing the propensity for undesirable reactions that could render the conjugate less safe or effective. Furthermore, the invention also relates to such immunogenic products and immunogenic compositions containing such immunogenic products made by such methods.Type: GrantFiled: July 7, 2011Date of Patent: July 28, 2015Assignees: Janssen Sciences Ireland UC, Wyeth LLCInventors: Rasappa G. Arumugham, A. Krishna Prasad, Michael Hagen
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Publication number: 20150038685Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Also described is a method for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 1 polysaccharide covalently linked to a carrier protein, the method including partial de-O-acetylation of the polysaccharide by mild hydrolysis in an alkaline pH buffer.Type: ApplicationFiled: October 21, 2014Publication date: February 5, 2015Inventors: William P. Hausdorff, George Rainer Siber, Peter R. Paradiso, A. Krishna Prasad
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Patent number: 8895724Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Also described is a method for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 1 polysaccharide covalently linked to a carrier protein, the method including partial de-O-acetylation of the polysaccharide by mild hydrolysis in an alkaline pH buffer.Type: GrantFiled: September 22, 2010Date of Patent: November 25, 2014Assignee: Wyeth LLCInventors: William P. Hausdorff, George Rainer Siber, Peter R. Paradiso, A. Krishna Prasad
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Patent number: 8603484Abstract: An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Also described is a method for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 3 polysaccharide covalently linked to a carrier protein, the method including periodic acid oxidation of the polysaccharide in the presence of bivalent cations.Type: GrantFiled: February 4, 2010Date of Patent: December 10, 2013Assignee: Wyeth LLCInventor: A. Krishna Prasad
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Publication number: 20120276137Abstract: The present invention relates to immunogenic conjugates comprising S. aureus serotype 5 and 8 capsular polysaccharides conjugated to carrier proteins and methods for their preparation and use. Methods for making the immunogenic conjugates of the invention involve covalent conjugation of the capsular polysaccharides with the carrier proteins using conjugation chemistry involving either 1,1-carboyl-di-1,2,4-triazole (CDT) or 3-(2-pyridyldithio)-propionyl hydrazide (PDPH).Type: ApplicationFiled: June 22, 2010Publication date: November 1, 2012Applicant: Wyeth LLCInventors: Stephen John Freese, Annaliesa Anderson, Viliam Pavliak, Kathrin Ute Jansen, Ingrid Lea Scully, Tracy Dee Scott, Jasdeep Singh Nanra, A. Krishna Prasad, Bruce Arthur Green
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Publication number: 20120207706Abstract: The present invention is directed to methods of producing conjugates of A? peptide immunogens with protein/polypeptide carrier molecules, which are useful as immunogens, wherein peptide immunogens are conjugated to protein carriers via activated functional groups on amino acid residues of the carrier or of the optionally attached linker molecule, and wherein any unconjugated reactive functional groups on amino acid residues are inactivated via capping, thus retaining the immunological functionality of the carrier molecule, but reducing the propensity for undesirable reactions that could render the conjugate less safe or effective. Furthermore, the invention also relates to such immunogenic products and immunogenic compositions containing such immunogenic products made by such methods.Type: ApplicationFiled: February 14, 2012Publication date: August 16, 2012Applicants: Wyeth LLC, Janssen Alzheimer ImmunotherapyInventors: Rasappa G. Arumugham, A. Krishna Prasad
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Patent number: 8227403Abstract: The present invention is directed to methods of producing conjugates of A? peptide immunogens with protein/polypeptide carrier molecules, which are useful as immunogens, wherein peptide immunogens are conjugated to protein carriers via activated functional groups on amino acid residues of the carrier or of the optionally attached linker molecule, and wherein any unconjugated reactive functional groups on amino acid residues are inactivated via capping, thus retaining the immunological functionality of the carrier molecule, but reducing the propensity for undesirable reactions that could render the conjugate less safe or effective. Furthermore, the invention also relates to such immunogenic products and immunogenic compositions containing such immunogenic products made by such methods.Type: GrantFiled: December 17, 2004Date of Patent: July 24, 2012Assignees: Wyeth LLC, Janssen Alzheimer ImmunotherapyInventors: Rasappa G. Arumugham, A. Krishna Prasad, Michael Hagen