Patents by Inventor Radhakrishnan P. Iyer

Radhakrishnan P. Iyer 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: 20120053226
    Abstract: The invention relates to design of short oligonucleotides and analogs thereof (such as, di-, and trinucleotide compounds) useful for various therapeutic applications. It is believed that the compounds of the invention can be used as antiviral agents, anticancer agents and so on. In certain embodiments, the compounds of the invention can modulate immune-stimulatory pathways and non-TLR pathways. The invention also relates to design modified oligonucleotides for therapeutic applications, by excluding nucleotide segments having off-target effects from the modified oligonucleotides. In another aspect, the invention provides pharmaceutical compositions including one or more compounds of the invention. It is believed that the compounds and compositions as described herein have therapeutic utility against a variety of diseases, including viral diseases, autoimmune diseases (such as, allergy, asthma, and inflammatory disorders) and cancer.
    Type: Application
    Filed: August 25, 2011
    Publication date: March 1, 2012
    Applicant: Spring Bank Pharmaceuticals, Inc.
    Inventors: Radhakrishnan P. Iyer, John E. Coughlin
  • Patent number: 8076303
    Abstract: The present invention discloses compounds of formula (I): which exhibit antiviral properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of anti-HBV treatment. The invention also relates to methods of treating a HBV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: December 13, 2011
    Assignee: Spring Bank Pharmaceuticals, Inc.
    Inventors: Radhakrishnan P. Iyer, Seetharamaiyer Padmanabhan
  • Publication number: 20110207690
    Abstract: The present invention provides compositions methods for treating susceptible viral infections, especially hepatitis C viral (HCV) infections as well as co infections of HCV with other viruses such as HBV and/or HIV. In one embodiment, the present invention provides compositions having the formula (I) and their use in treating viral infections: or a pharmaceutically acceptable salt, ester, stereoisomer, tautomers, solvate, prodrug, or combination thereof.
    Type: Application
    Filed: October 4, 2010
    Publication date: August 25, 2011
    Applicant: Spring Bank Pharmaceuticals, Inc.
    Inventors: Radhakrishnan P. Iyer, Seetharamaiyer Padmanabhan
  • Patent number: 7709449
    Abstract: The invention provides compounds capable of treating against hepatitis infections, particularly hepatitis B viral infections. Compounds of the invention are nucleic acid-based and preferably comprise 2, 3, 4, 5 or 6 nucleoside units.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: May 4, 2010
    Assignee: Migenix, Inc.
    Inventors: Radhakrishnan P. Iyer, Yi Jin, Arlene Roland, Wenqiang Zhou
  • Publication number: 20100096251
    Abstract: The present invention describes extremely rapid and efficient methods for the attachment of chemical moieties to matrices by the use of microwave technology. The methods of the invention can be applied in a variety of ways for the preparation of different types of matrices for a variety of applications including but not limited to the functionalization of various solid supports, and matrices in the form of powder, beads, sheets, and other suitable surfaces for use in applications including but not limited to oligonucleotide synthesis, peptide synthesis, environmental clean up (removal of toxic materials), immunoassays, affinity chromatography, combinatorial chemistry, microarrays, proteomics and medical diagnostics.
    Type: Application
    Filed: December 17, 2009
    Publication date: April 22, 2010
    Inventors: Seetharamaiyer Padmanabhan, Radhakrishnan P. Iyer
  • Publication number: 20080188429
    Abstract: This invention relates to the design and synthesis of chemically modified short interfering nucleic acid (siNA) compounds capable of mediating RNA interference (RNAi) against target genes.
    Type: Application
    Filed: December 23, 2003
    Publication date: August 7, 2008
    Inventor: Radhakrishnan P. Iyer
  • Patent number: 7256179
    Abstract: The invention provides compounds capable of treating against hepatitis infections, particularly hepatitis B viral infections. Compounds of the invention are nucleic acid-based and preferably comprise 2, 3, 4, 5 or 6 nucleoside units.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: August 14, 2007
    Assignee: Migenix, Inc.
    Inventors: Radhakrishnan P. Iyer, Yi Jin, Arlene Roland, Wenqiang Zhou
  • Patent number: 6881831
    Abstract: The invention provides compounds capable of treating against hepatitis infections, particularly hepatitis B viral infections. Compounds of the invention are nucleic acid-based and preferably comprise 2, 3, 4, 5 or 6 nucleoside units.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: April 19, 2005
    Assignee: Migenix Inc.
    Inventors: Radhakrishnan P. Iyer, Yi Jin, Arlene Roland, Wenqiang Zhou
  • Publication number: 20030153744
    Abstract: The present invention comprises 7-deaza L-nucleosides having unexpectedly high inhibitory activity against the hepatitis B virus. The invention further comprises pharmaceutical compositions comprising such compounds as well as methods of treating mammals, particularly humans, infected with HBV and other viral infections.
    Type: Application
    Filed: December 20, 2002
    Publication date: August 14, 2003
    Applicant: Micrologix Biotech Inc.
    Inventors: Khalid Mekouar, Robert Deziel, Samir Mounir, Radhakrishnan P. Iyer
  • Publication number: 20030143331
    Abstract: The present invention provides an alternative method of attaching a 3′-thiophosphate mononucleotide or oligonucleotide to a solid support. The method permits chemoselective binding of a thiophosphate mono- or oligonucleotide to a solid support. The present invention is useful in production of microarrays, chips, beads or other solid matrices for gene expression profiling, single nucleotide polymorphism, and pharmacogenomics, target validation, sequencing and for any application that involves contacting a target nucleic acid sequence with a support-bound probe.
    Type: Application
    Filed: October 3, 2002
    Publication date: July 31, 2003
    Applicant: Micrologix Biotech Inc.
    Inventors: Radhakrishnan P. Iyer, Rajendra K. Pandey, Satya N. Kuchimanchi, Arlene Roland
  • Publication number: 20030138797
    Abstract: The present invention relates to novel phosphoramidate compounds and libraries containing such compounds, and methods for preparing such compounds. Compounds of the invention will be useful in a variety of applications, e.g. as a nucleoside or oligonucleotide therapeutic agent, or for diagnostic or analytical applications, e.g. as a capture probe in a hybridization assay.
    Type: Application
    Filed: June 28, 2002
    Publication date: July 24, 2003
    Applicant: Micrologix Biotech Inc.
    Inventors: Radhakrishnan P. Iyer, Yi Jin, Arlene Roland
  • Publication number: 20030109471
    Abstract: The invention provides compounds capable of treating against hepatitis infections, particularly hepatitis B viral infections. Compounds of the invention are nucleic acid-based and preferably comprise 2, 3, 4, 5 or 6 nucleoside units.
    Type: Application
    Filed: May 15, 2002
    Publication date: June 12, 2003
    Inventors: Radhakrishnan P. Iyer, Yi Jin, Arlene Roland, Wenqiang Zhou
  • Publication number: 20030087256
    Abstract: The invention comprises short, thiophosphate nucleic acids (primarily mono-, di-, and tri-nucleotides), libraries comprising them, and methods of using them as therapeutic anti-viral (particularly anti-HBV) agents.
    Type: Application
    Filed: April 8, 2002
    Publication date: May 8, 2003
    Applicant: Micrologix Biotech Inc.
    Inventor: Radhakrishnan P. Iyer
  • Patent number: 6531589
    Abstract: The invention provides new methods for synthesizing oligonucleotides that allow for deprotection of the oligonucleotides under more mild conditions than existing methods. The invention further provides a nucleoside base protecting group that is stable under oligonucleotide synthesis conditions, but which can be removed under more mild conditions than existing protecting groups, as well as nucleoside synthons having such base protecting groups.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: March 11, 2003
    Assignee: Hybridon, Inc.
    Inventors: Radhakrishnan P. Iyer, Theresa Devlin, Ivan Habus, Dong Yu, Sudhir Agrawal, Nan-Hui Ho
  • Patent number: 6509459
    Abstract: The invention provides new processes for synthesizing oligonucleotides that allow for deprotection of the oligonucleotide under more rapid and/or more mild conditions than existing methods. The invention further provides a nucleoside base protecting group that is stable under oligonucleotide synthesis conditions, but which can be removed under more mild conditions than existing protecting groups, as well as nucleoside synthons having such base protecting groups. The invention also provides oligonucleotides containing any of a variety of base labile functionalities and methods for using such oligonucleotides.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: January 21, 2003
    Assignee: Hybridon, Inc.
    Inventors: Sudhir Agrawal, Radhakrishnan P. Iyer, Ivan Habus, Dong Yu
  • Publication number: 20020127598
    Abstract: The invention provides methods for solution-phase synthesis of nucleotide-based compounds and new libraries of such compounds. Compounds of the invention are useful for a variety of therapeutic applications, including treatment of viral or bacterial infections and associated diseases and disorders.
    Type: Application
    Filed: March 27, 2001
    Publication date: September 12, 2002
    Inventors: Wenqiang Zhou, Sathya Upendran, Radhakrishnan P. Iyer
  • Patent number: 6140482
    Abstract: The invention provides new primary phosphoramidate internucleoside linkages that are less sterically constrained than existing phosphoramidate linkages, as well as oligonucleotides containing such linkages and processes for making and methods for using such oligonucleotides.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: October 31, 2000
    Assignee: Hybridon, Inc.
    Inventors: Radhakrishnan P. Iyer, Theresa Devlin, Ivan Habus, Dong Yu, Sudhir Agrawal
  • Patent number: 6117993
    Abstract: The invention provides new reagents and processes for synthesizing oligonucleotides, including stereoselective oligonucleotide synthesis. In a first aspect, the invention provides novel monomer synthons for the synthesis of oligonucleotides. Monomer synthons according to this aspect of the invention are useful in the synthesis of oligonucleotides and can be used in place of the well known beta-cyanoethyl phosphoramidite monomer synthon in the phosphoramidite synthesis procedure. Certain monomer synthons according to this aspect of the invention are useful in this procedure for producing oligonucleotides having defined stereochemistry.In a second aspect, the invention provides processes for synthesizing monomer synthons according to the invention, including diastereomerically enriched or purified monomer synthons.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: September 12, 2000
    Assignee: Hybridon, Inc.
    Inventors: Radhakrishnan P. Iyer, Dong Yu, Mao-Jun Guo, Sudhir Agrawal
  • Patent number: 6117992
    Abstract: The invention provides new methods for synthesizing oligonucleotides containing at least one, and preferably all phosphorodithioate internucleoside linkages with less than 5% phosphoromonothioate contamination. This level of purity in the synthesis of phosphorodithoates has previously been very difficult to achieve with all existing methods. The invention further provides phosphorothioamidite nucleoside synthons comprising a sulfur protecting group that is stable under normal oligonucleotide synthesis conditions.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: September 12, 2000
    Assignee: Hybridon, Inc.
    Inventor: Radhakrishnan P. Iyer
  • Patent number: 5962674
    Abstract: The invention provides new reagents and an improved process for synthesizing oligonucleotides that contain methylphosphonate internucleoside linkages. The reagents and process utilize a nucleoside base protecting group that is stable under oligonucleotide synthesis conditions, but which can be removed under more mild conditions than existing protecting groups.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: October 5, 1999
    Assignee: Hybridon, Inc.
    Inventors: Radhakrishnan P. Iyer, Theresa Devlin, Ivan Habus, Dong Yu, Sudhir Agrawal