Patents by Inventor William N. Drohan

William N. Drohan 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: 20230287471
    Abstract: The invention relates to commercially viable methods for producing biologically active vitamin K dependent proteins, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent ?-glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.
    Type: Application
    Filed: October 20, 2022
    Publication date: September 14, 2023
    Inventors: William N. Drohan, Michael J. Griffith, John R. Taylor, Darrel W. Stafford
  • Publication number: 20230272360
    Abstract: Methods of isolating highly sialylated recombinant vitamin K dependent proteins, particularly Factor IX, by chromatographic methods am described. The highly sialylated recombinant proteins are characterized. The improved Factor IX has at least 62% N-glycosylation with 3 or 4 sialic acid residues and improved bioavailability and pharmokinetic properties.
    Type: Application
    Filed: December 10, 2021
    Publication date: August 31, 2023
    Inventors: Michael J. Griffith, William N. Drohan
  • Publication number: 20210095323
    Abstract: The invention relates to commercially viable methods for producing biologically active vitamin K dependent protein, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent ?-glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.
    Type: Application
    Filed: June 2, 2020
    Publication date: April 1, 2021
    Inventors: William N. Drohan, Michael J. Griffith, John R. Taylor, Darrel W. Stafford
  • Publication number: 20190264188
    Abstract: Methods of isolating highly sialylated recombinant vitamin K dependent proteins, particularly Factor IX, by chromatographic methods are described. The highly sialylated recombinant proteins are characterized. The improved Factor IX has at least 62% N-glycosylation with 3 or 4 sialic acid residues and improved bioavailability and pharmokinetic properties.
    Type: Application
    Filed: May 10, 2019
    Publication date: August 29, 2019
    Inventors: Michael J. Griffith, William N. Drohan
  • Publication number: 20190032101
    Abstract: The invention relates to commercially viable methods for producing biologically active vitamin R dependent proteins, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent ?-glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.
    Type: Application
    Filed: January 19, 2018
    Publication date: January 31, 2019
    Inventors: William N. Drohan, Michael J. Griffith, John R. Taylor, Darrel W. Stafford
  • Patent number: 9587008
    Abstract: Methods for producing cell lines with high levels of biologically active recombinant vitamin K dependent proteins are described. The transfected cell lines do not include heterologous genes for processing enzymes and are not subject to selection pressure such as methotrexate resistance. Cell lines producing Factor VII/VIIa and Factor IX are described. These cell lines can be used for isolation of Factor VII/VIIa and/or Factor IX for treatment of Hemophilia.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: March 7, 2017
    Assignee: APTEVO BIOTHERAPEUTICS LLC
    Inventors: William N. Drohan, Michael J. Griffith
  • Publication number: 20160244738
    Abstract: Methods of isolating highly sialylated recombinant vitamin K dependent proteins, particularly Factor IX, by chromatographic methods are described. The highly sialylated recombinant proteins are characterized. The improved Factor IX has at least 62% N-glycosylation with 3 or 4 sialic acid residues and improved bioavailability and pharmokinetic properties.
    Type: Application
    Filed: September 21, 2015
    Publication date: August 25, 2016
    Inventors: Michael J. Griffith, William N. Drohan
  • Publication number: 20160108449
    Abstract: The invention relates to commercially viable methods for producing biologically active vitamin K dependent proteins, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent ?-glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.
    Type: Application
    Filed: April 13, 2015
    Publication date: April 21, 2016
    Inventors: William N. Drohan, Michael J. Griffith, John R. Taylor, Darrel W. Stafford
  • Publication number: 20140369994
    Abstract: Methods for producing cell lines with high levels of biologically active recombinant vitamin K dependent proteins are described. The transfected cell lines do not include heterologous genes for processing enzymes and are not subject to selection pressure such as methotrexate resistance. Cell lines producing Factor VII/VIIa and Factor IX are described. These cell lines can be used for isolation of Factor VII/VIIa and/or Factor IX for treatment of Hemophilia.
    Type: Application
    Filed: September 3, 2014
    Publication date: December 18, 2014
    Inventors: William N. Drohan, Michael J. Griffith
  • Publication number: 20130266982
    Abstract: The invention relates to commercially viable methods for producing biologically active vitamin K dependent proteins, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent ?-glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.
    Type: Application
    Filed: November 19, 2012
    Publication date: October 10, 2013
    Inventors: William N. Drohan, Michael J. Griffith, John R. Taylor, Darrell W. Stafford
  • Publication number: 20120276079
    Abstract: Methods for producing cell lines with high levels of biologically active recombinant vitamin K dependent proteins are described. The transfected cell lines do not include heterologous genes for processing enzymes and are not subject to selection pressure such as methotrexate resistance. Cell lines producing Factor VII/VIIa and Factor IX are described. These cell lines can be used for isolation of Factor VII/VIIa and/or Factor IX for treatment of Hemophilia.
    Type: Application
    Filed: April 30, 2012
    Publication date: November 1, 2012
    Applicant: Inspiration Biopharmaceuticals, Inc.
    Inventors: William N. Drohan, Marian J. Drohan, Michael J. Griffith
  • Publication number: 20110091353
    Abstract: Methods are disclosed for sterilizing tissue to reduce the level of one or more active biological contaminants or pathogens therein, such as viruses, bacteria, (including inter- and intracellular bacteria, such as mycoplasmas, ureaplasmas, nanobacteria, chlamydia, rickettsias), yeasts, molds, fungi, prions or similar agents responsible, alone or in combination, for TSEs and/or single or multicellular parasites. The methods involve sterilizing one or more tissues with irradiation.
    Type: Application
    Filed: December 2, 2010
    Publication date: April 21, 2011
    Inventors: Wilson Burgess, William N. Drohan, Martin J. Macphee, David M. Mann
  • Patent number: 7848487
    Abstract: Methods are disclosed for sterilizing biological materials to reduce the level of one or more active biological contaminants or pathogens therein, such as viruses, bacteria (including inter- and intracellular bacteria, such as mycoplasmas, ureaplasmas, nanobacteria, chlamydia, rickettsias), yeasts, molds, fungi, prions or similar agents responsible, alone or in combination, for TSEs and/or single or multicellular parasites. The methods involve sterilizing biological materials containing one or more non-aqueous solvents with irradiation.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: December 7, 2010
    Assignee: Clearant, Inc.
    Inventors: Shirley Miekka, Martin J. Macphee, William N. Drohan, David Mann, Wilson Burgess
  • Publication number: 20100081187
    Abstract: Methods of isolating highly sialylated recombinant vitamin K dependent proteins, particularly Factor IX, by chromatographic methods are described. The highly sialylated recombinant proteins are characterized. The improved Factor IX has at least 62% N-glycosylation with 3 or 4 sialic acid residues and improved bioavailability and pharmokinetic properties.
    Type: Application
    Filed: April 28, 2008
    Publication date: April 1, 2010
    Inventors: Michael J. Griffith, William N. Drohan, Marian J. Drohan
  • Publication number: 20090221492
    Abstract: Recombinant Factor IX characterized by a high percentage of active protein can be obtained in the milk of transgenic animals that incorporate chimeric DNA molecules according to the present invention. Transgenic animals of the present invention are produced by introducing into developing embryos DNA that encodes Factor IX, such that the foreign DNA is stably incorporated in the DNA of germ line cells of the mature animal. Particularly efficient expression was accomplished using a chimeric construct comprising a mammary gland specific promoter, Factor IX cDNA that lacked the complete or any portion of the 5?-untranslated and 3?-untranslated region, which is substituted with a 5-? and 3?-end of the mouse whey acidic protein gene. In vitro cell cultures of cells explanted from the transgenic mammal of the invention and methods of producing Factor IX from such said culture and methods of treating hemophilia B are also described.
    Type: Application
    Filed: August 29, 2008
    Publication date: September 3, 2009
    Inventors: William H. Velander, William N. Drohan, Henryk Lubon, John L. Johnson, Mary Ann H. Johnson
  • Publication number: 20090202039
    Abstract: Methods are disclosed for sterilizing biological materials to reduce the level of one or more active biological contaminants or pathogens therein, such as viruses, bacteria (including inter- and intracellular bacteria, such as mycoplasmas, ureaplasmas, nanobacteria, chlamydia, rickettsias), yeasts, molds, fungi, prions or similar agents responsible, alone or in combination, for TSEs and/or single or multicellular parasites. The methods involve sterilizing biological materials containing one or more non-aqueous solvents with irradiation.
    Type: Application
    Filed: November 3, 2008
    Publication date: August 13, 2009
    Inventors: Shirley Miekka, Martin J. Macphee, William N. Drohan, David Mann, Wilson Burgess
  • Patent number: 7435869
    Abstract: A transgenic, non-human mammalian animal is capable of expressing a heterologous gene for human or other recombinant physiologically functional fibrinogen holoprotein or individual subunit chain polypeptides thereof or a modified or fusion fibrinogen in mammary glands of the animals and secreting the expressed product into a body fluid. Methodology employing such a mammal yields recombinant physiologically functional fibrinogens, subunit chain polypeptides thereof, and modified or fusion fibrinogens.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: October 14, 2008
    Assignees: Virgina Tech. Intellectual Properties, Inc., American National Red Cross, University of North Carolina at Chapel Hill
    Inventors: William H. Velander, William N. Drohan, Henryk Lubon, John L. Johnson
  • Patent number: 7419948
    Abstract: Recombinant Factor IX characterized by a high percentage of active protein can be obtained in the milk of transgenic animals that incorporate chimeric DNA molecules according to the present invention. Transgenic animals of the present invention are produced by introducing into developing embryos DNA that encodes Factor IX, such that the foreign DNA is stably incorporated in the DNA of germ line cells of the mature animal. Particularly efficient expression was accomplished using a chimeric construct comprising a mammary gland specific promoter, Factor IX cDNA that lacked the complete or any portion of the 5?-untranslated and 3?-untranslated region, which is substituted with a 5-? and 3?-end of the mouse whey acidic protein gene. In vitro cell cultures of cells explanted from the transgenic mammal of the invention and methods of producing Factor IX from such said culture and methods of treating hemophilia B are also described.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: September 2, 2008
    Assignees: American Red Cross, Virginia Tech Intellectual Properties, Inc.
    Inventors: William H. Velander, William N. Drohan, Henryk Lubon, Mary Ann H. Johnson, legal representative, John L. Johnson
  • Patent number: 7252799
    Abstract: Methods are disclosed for sterilizing preparations containing albumin to reduce the level of one or more active biological contaminants or pathogens therein, such as viruses, bacteria (including inter- and intracellular bacteria, such as mycoplasmas, ureaplasmas, nanobacteria, chlamydia, rickettsias), yeasts, molds, fungi, prions or similar agents responsible, alone or in combination, for TSEs and/or single or multicellular parasites. These methods involve sterilizing preparations containing albumin, such as plasma protein fractions, with irradiation.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: August 7, 2007
    Assignee: Clearant, Inc.
    Inventors: Shirley I. Miekka, Wilson Burgess, William N. Drohan, Martin J. Macphee, Randall S. Kent, David M. Mann, Yuri Griko
  • Patent number: 7229959
    Abstract: This invention provides supplemented and unsupplemented tissue sealants as well as methods for their production and use thereof. Disclosed are tissue sealants supplemented with at least one antibody. The composition may be further supplemented with, for example, one or more analgesics, antimicrobial compositions, anticoagulants, antiproliferatives, anti-inflammatory compounds, cytokines, cytotoxins, drugs, growth factors, interferons, hormones, lipids, demineralized bone or bone morphogenetic proteins, cartilage inducing factors, oligonucleotides polymers, polysaccharides, polypeptides, protease inhibitors, vasoconstrictors or vasodilators, vitamins, minerals, stabilizers and the like.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 12, 2007
    Assignee: The American National Red Cross
    Inventors: William N. Drohan, Martin J. MacPhee, Hernan Nunez, Gene Liau, Wilson H. Burgess, Thomas Maciag