Patents by Inventor Robert H. Purcell

Robert H. Purcell 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: 9181530
    Abstract: The invention relates to the discovery of an HEV strain from a chronically infected patient. The virus grow unusually well in numerous cell cultures. Thus, the invention provides cell cultures, vectors, and vaccine compositions based on the virus. The invention relates, in part, on the identification of a new strain of HEV genotype 3 virus. Strain Kernow-C1 (genotype 3) of HEV, which was isolated from a chronically infected patient, was used to identify human, pig and deer cell lines permissive for infection. Adaptation of the Kernow-C 1 strain to growth in human hepatoma cells selected for a rare virus recombinant that contained an insertion of 174 ribonucleotides (58 amino acids) of a human ribosomal protein gene and additional mutations.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: November 10, 2015
    Assignees: The United States of America, as represented by the Secretary, Department of Health and Human Services, Royal Cornwall Hospital Trust
    Inventors: Suzanne U. Emerson, Priyanka Shukla, Hanh T. Nguyen, Robert H. Purcell, Harry R. Dalton, Richard Bendall
  • Publication number: 20150252098
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize Orthopoxviruses. The invention provides such antibodies, fragments of such antibodies retaining B5 or A33 binding ability, fully human antibodies retaining B5 or A33 binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Application
    Filed: March 19, 2015
    Publication date: September 10, 2015
    Inventors: Zhaochun CHEN, Patricia EARL, Bernard MOSS, Suzanne U. EMERSON, Robert H. PURCELL
  • Patent number: 8999336
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize Orthopoxviruses. The invention provides such antibodies, fragments of such antibodies retaining B5 or A33 binding ability, fully human antibodies retaining B5 or A33 binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: April 7, 2015
    Assignee: The United States of America, as represented by the Secretary, Department of Health and Human Services
    Inventors: Zhaochun Chen, Patricia Earl, Bernard Moss, Suzanne U. Emerson, Robert H. Purcell
  • Patent number: 8961975
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax lethal factor (LF), edema factor (EF), and/or protective antigen (PA). The invention provides such antibodies, fragments of such antibodies retaining anthrax toxin-binding ability, fully human or humanized antibodies retaining anthrax toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: February 24, 2015
    Assignee: The United States of America, as represented by the Secretary, Department of Health and Human Services
    Inventors: Zhaochun Chen, Robert H. Purcell, Suzanne U. Emerson, Stephen H. Leppla, Mahtab Moayeri
  • Publication number: 20150017153
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax lethal factor (LF), edema factor (EF), and/or protective antigen (PA). The invention provides such antibodies, fragments of such antibodies retaining anthrax toxin-binding ability, fully human or humanized antibodies retaining anthrax toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Application
    Filed: September 19, 2013
    Publication date: January 15, 2015
    Inventors: Zhaochun CHEN, Robert H. PURCELL, Suzanne U. EMERSON, Stephen H. LEPPLA, Mahtab MOAYERI
  • Publication number: 20140227257
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax protective antigen (PA) toxin. The invention provides such antibodies, fragments of such antibodies retaining anthrax PA toxin-binding ability, fully human or humanized antibodies retaining anthrax PA toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 14, 2014
    Applicant: The USA, as represented by the Secretary, Department of Health and Human Services
    Inventors: Zhaochun CHEN, Stephen H. LEPPLA, Mahtab MOAYERI, Suzanne U. EMERSON, Robert H. PURCELL
  • Patent number: 8685396
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax protective antigen (PA) toxin. The invention provides such antibodies, fragments of such antibodies retaining anthrax PA toxin-binding ability, fully human or humanized antibodies retaining anthrax PA toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: April 1, 2014
    Assignee: The United States of America, as represented by the Secretary, Department of Health and Human Services
    Inventors: Zhaochun Chen, Stephen Leppla, Mahtab Moayeri, Suzanne U. Emerson, Robert H. Purcell
  • Publication number: 20130344058
    Abstract: The present invention relates to a variant of a parent polypeptide comprising an Fc region, which variant binds an Fc gamma receptor (Fc?R) with lower affinity than the parent polypeptide and comprises a deletion of at least one amino acid in about position 100 to about position 150 in the Fc region and related nucleic acids, vectors, host cells and methods of producing the variant and methods for preventing or treating a disorder in a mammal.
    Type: Application
    Filed: December 20, 2012
    Publication date: December 26, 2013
    Applicant: The U.S. as represented by the Secretary, Department of Health & Human Services
    Inventors: Ana P. Goncalvez, Robert H. Purcell, Ching-Juh Lai
  • Publication number: 20130302790
    Abstract: The invention relates to the discovery of an HEV strain from a chronically infected patient. The virus grow unusually well in numerous cell cultures. Thus, the invention provides cell cultures, vectors, and vaccine compositions based on the virus. The invention relates, in part, on the identification of a new strain of HEV genotype 3 virus. Strain Kernow-C1 (genotype 3) of HEV, which was isolated from a chronically infected patient, was used to identify human, pig and deer cell lines permissive for infection. Adaptation of the Kernow-C 1 strain to growth in human hepatoma cells selected for a rare virus recombinant that contained an insertion of 174 ribonucleotides (58 amino acids) of a human ribosomal protein gene and additional mutations.
    Type: Application
    Filed: January 10, 2012
    Publication date: November 14, 2013
    Applicants: Royal Cornwall Hospital Trust, The Government of the United States of America, as represented by the Secretary, Department of Healt
    Inventors: Suzanne U. Emerson, Priyanka Shukla, Hanh T. Nguyen, Robert H. Purcell, Harry R. Dalton, Richard Bendall
  • Publication number: 20130295090
    Abstract: Disclosed herein are isolated humanized monoclonal antibodies that specifically bind Japanese encephalitis virus (JEV) with a binding affinity of about 1.0 nM or less. Nucleic acids encoding these antibodies, expression vectors including these nucleic acid molecules, and isolated host cells that express the nucleic acid molecules are also disclosed. Methods of treating, preventing, and/or ameliorating JEV infection in a subject with JEV also are disclosed. Additionally, the antibodies can be used to detect JEV in a sample, and methods of diagnosing JEV infection, or confirming a diagnosis of JEV infection in a subject, are disclosed herein that utilize these antibodies.
    Type: Application
    Filed: July 12, 2013
    Publication date: November 7, 2013
    Inventors: Ana P. Goncalvez, Robert H. Purcell, Ching-Juh Lai
  • Patent number: 8574853
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax lethal factor (LF), edema factor (EF), and/or protective antigen (PA). The invention provides such antibodies, fragments of such antibodies retaining anthrax toxin-binding ability, fully human or humanized antibodies retaining anthrax toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: November 5, 2013
    Assignee: The United States of America, as represented by the Secretary, Department of Health and Human Services
    Inventors: Zhaochun Chen, Robert H. Purcell, Suzanne U. Emerson, Stephen H. Leppla, Mahtab Moayeri
  • Publication number: 20130287787
    Abstract: The present disclosure relates to monoclonal antibodies that bind poly-?-D-glutamic acid (?DPGA), which is present on the surface of Bacillus anthracis. The disclosure also provides chimeric forms of the monoclonal antibodies, humanized forms of the monoclonal antibodies, and fragments thereof, as well as nucleic acids encoding the antibodies and fragments thereof. Pharmaceutical compositions including such antibodies are also disclosed herein. The disclosure further provides prophylactic, therapeutic, and diagnostic methods of using the disclosed antibodies.
    Type: Application
    Filed: July 5, 2013
    Publication date: October 31, 2013
    Inventors: Zhaochun Chen, Robert H. Purcell, Rachel Schneerson, Joanna Kubler-Kielb, Lily Z. Dai
  • Patent number: 8506961
    Abstract: Disclosed herein are isolated humanized monoclonal antibodies that specifically bind Japanese encephalitis virus (JEV) with a binding affinity of about 1.0 nM or less. Nucleic acids encoding these antibodies, expression vectors including these nucleic acid molecules, and isolated host cells that express the nucleic acid molecules are also disclosed. Methods of treating, preventing, and/or ameliorating JEV infection in a subject with JEV also are disclosed. Additionally, the antibodies can be used to detect JEV in a sample, and methods of diagnosing JEV infection, or confirming a diagnosis of JEV infection in a subject, are disclosed herein that utilize these antibodies.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: August 13, 2013
    Assignee: The United States of America as Represented by the Secretary Department of Health and Human Services
    Inventors: Ana P. Goncalvez, Robert H. Purcell, Ching-Juh Lai
  • Patent number: 8501182
    Abstract: The present disclosure relates to monoclonal antibodies that bind poly-?-D-glutamic acid (?DPGA), which is present on the surface of Bacillus anthracis. The disclosure also provides chimeric forms of the monoclonal antibodies, humanized forms of the monoclonal antibodies, and fragments thereof, as well as nucleic acids encoding the antibodies and fragments thereof. Pharmaceutical compositions including such antibodies are also disclosed herein. The disclosure further provides prophylactic, therapeutic, and diagnostic methods of using the disclosed antibodies.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: August 6, 2013
    Assignee: The United States of America, as Represented by the Secretary of the Department of Health and Human Services
    Inventors: Zhaochun Chen, Robert H. Purcell, Rachel Schneerson, Joanna Kubler-Kielb, Lily Z. Dai
  • Patent number: 8404818
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize Orthopoxviruses. The invention provides such antibodies, fragments of such antibodies retaining B5 or A33 binding ability, fully human antibodies retaining B5 or A33 binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: March 26, 2013
    Assignee: The United States of America, as represented by the Secretary, Department of Health and Human Services
    Inventors: Zhaochun Chen, Patricia Earl, Bernard Moss, Suzanne U. Emerson, Robert H. Purcell
  • Patent number: 8337854
    Abstract: The present invention relates to a variant of a parent polypeptide comprising an Fc region, which variant binds an Fc gamma receptor (Fc?R) with lower affinity than the parent polypeptide and comprises a deletion of at least one amino acid in about position 100 to about position 150 in the Fc region and related nucleic acids, vectors, host cells and methods of producing the variant and methods for preventing or treating a disorder in a mammal.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: December 25, 2012
    Assignee: The United States of America, as represented by the Secretary, Department of Health & Human Services
    Inventors: Ana P. Goncalvez, Robert H. Purcell, Ching-Juh Lai
  • Patent number: 8337853
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize dengue type 1, 2, 3, and/or 4 virus. The invention provides such antibodies, fragments of such antibodies retaining dengue virus-binding ability, fully human or humanized antibodies retaining dengue virus-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: December 25, 2012
    Assignee: The United States of America as represented by the Secretary, Department of Health & Human Services
    Inventors: Ching-Juh Lai, Robert H. Purcell
  • Publication number: 20120171196
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax lethal factor (LF), edema factor (EF), and/or protective antigen (PA). The invention provides such antibodies, fragments of such antibodies retaining anthrax toxin-binding ability, fully human or humanized antibodies retaining anthrax toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Application
    Filed: December 2, 2011
    Publication date: July 5, 2012
    Applicant: The United States of America as represented by the Secretary, Department of Health & Human Services
    Inventors: Zhaochun CHEN, Robert H. PURCELL, Suzanne U. EMERSON, Stephen H. LEPPLA, Mahtab MOAYERI
  • Patent number: 8071100
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize anthrax lethal factor (LF), edema factor (EF), and/or protective antigen (PA). The invention provides such antibodies, fragments of such antibodies retaining anthrax toxin-binding ability, fully human or humanized antibodies retaining anthrax toxin-binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: December 6, 2011
    Assignee: The Unites States of America as represented by the Secretary of Department of Health and Human Services
    Inventors: Zhaochun Chen, Robert H. Purcell, Suzanne U. Emerson, Stephen H. Leppla, Mahtab Moayeri
  • Publication number: 20110243840
    Abstract: The present invention relates to monoclonal antibodies that bind or neutralize Orthopoxviruses. The invention provides such antibodies, fragments of such antibodies retaining B5 or A33 binding ability, fully human antibodies retaining B5 or A33 binding ability, and pharmaceutical compositions including such antibodies. The invention further provides for isolated nucleic acids encoding the antibodies of the invention and host cells transformed therewith. Additionally, the invention provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the invention.
    Type: Application
    Filed: March 2, 2011
    Publication date: October 6, 2011
    Applicants: Department of Health and Human Services
    Inventors: Zhaochun Chen, Patricia Earl, Bernard Moss, Suzanne U. Emerson, Robert H. Purcell