Patents by Inventor Stephen Hamilton

Stephen Hamilton 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: 9139632
    Abstract: Methods for producing proteins and glycoproteins in Pichia pastoris that lack detectable cross binding activity to antibodies made against host cell antigens are described. In particular, methods are described wherein recombinant Pichia pastoris strains that do not display a ?-mannosyltransferase 2 activity with respect to an N-glycan or O-glycan and do not display at least one activity selected from a ?-mannosyltransferase 1, 3, and 4 activity to produce recombinant proteins and glycoproteins. These recombinant Pichia pastoris strains can produce proteins and glycoproteins that lack detectable ?-mannosidase resistant ?-mannose residues thereon and thus, lack cross binding activity to antibodies against host cell antigens. Further described are methods for producing bi-sialylated human erythropoietin in Pichia pastoris that lack detectable cross binding activity to antibodies against host cell antigens.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: September 22, 2015
    Assignee: Merck Sharp & Dohme Corp.
    Inventors: Piotr Bobrowicz, Sujatha Gomathinayagam, Stephen Hamilton, Huijuan Li, Natarajan Sethuraman, Terrance A. Stadheim, Stefan Wildt
  • Patent number: 8986949
    Abstract: The present invention generally relates to methods of modifying the glycosylation structures of recombinant proteins expressed in fungi or other lower eukaryotes, to more closely resemble the glycosylation of proteins from higher mammals, in particular humans. The present invention also relates to novel enzymes and, nucleic acids encoding them and, hosts engineered to express the enzymes, methods for producing modified glycoproteins in hosts and modified glycoproteins so produced.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: March 24, 2015
    Assignee: Glycofi, Inc.
    Inventor: Stephen Hamilton
  • Patent number: 8936918
    Abstract: Lower eukaryotic host cells have been recombinantly engineered to produce glycoprotein having human-like O-glycosylation. The glycoproteins are useful for the production of glycoprotein compositions with advantages for the production of human therapeutics.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: January 20, 2015
    Assignee: Merck Sharp & Dohme Corp.
    Inventors: Piotr Bobrowicz, William J. Cook, Stephen Hamilton, Juergen Nett, Terrance A. Stadheim, Stefan Wildt
  • Patent number: 8883483
    Abstract: The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities such as those involved in glycosylation to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified oligosaccharides are created or selected. N-glycans made in the engineered host cells have a Man5GlcNAc2 core structure which may then be modified further by heterologous expression of one or more enzymes, e.g.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: November 11, 2014
    Assignee: GlycoFi, Inc.
    Inventors: Tillman U. Gerngross, Stefan Wildt, Byung-kwon Choi, Juergen Nett, Piotr Bobrowicz, Stephen Hamilton, Robert Davidson
  • Publication number: 20140200180
    Abstract: Methods for producing proteins and glycoproteins in Pichia pastoris that lack detectable cross binding activity to antibodies made against host cell antigens are described. In particular, methods are described wherein recombinant Pichia pastoris strains that do not display a ?-mannosyltransferase 2 activity with respect to an N-glycan or O-glycan and do not display at least one activity selected from a ?-mannosyltransferase 1, 3, and 4 activity to produce recombinant proteins and glycoproteins. These recombinant Pichia pastoris strains can produce proteins and glycoproteins that lack detectable ?-mannosidase resistant ?-mannose residues thereon and thus, lack cross binding activity to antibodies against host cell antigens. Further described are methods for producing bi-sialylated human erythropoietin in Pichia pastoris that lack detectable cross binding activity to antibodies against host cell antigens.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 17, 2014
    Applicant: Merck Sharp & Dohme Corp
    Inventors: Piotri Bobrowicz, Sujatha Gomathinayagam, Stephen Hamilton, Huijuan Li, Natarajan Setheraman, Terrance A. Stadheim, Stephan Wildt
  • Publication number: 20140011236
    Abstract: The present invention provides, in part, promoters for recombinant expression of polypeptides in host cells such as Pichia pastoris as well as methods of use thereof.
    Type: Application
    Filed: March 15, 2012
    Publication date: January 9, 2014
    Inventors: Robert Davidson, Bianka Prinz, I-Ming Wang, Stephen Hamilton, Ming-Tang Chen, Brian Mickus
  • Publication number: 20130295608
    Abstract: Lower eukaryotic host cells have been recombinantly engineered to produce glycoprotein having human-like O-glycosylation. The glycoproteins are useful for the production of glycoprotein compositions with advantages for the production of human therapeutics.
    Type: Application
    Filed: February 20, 2012
    Publication date: November 7, 2013
    Inventors: Piotr Bobrowicz, William J. Cook, Stephen Hamilton, Juergen Nett, Terrance A. Stadheim, Stefan Wildt
  • Publication number: 20130266981
    Abstract: A method for producing human-like glycoproteins by expressing a Class 2 ?-mannosidase having a substrate specificity for Man?1,3 and Man?1,6 glycosidic linkages in a lower eukaryote is disclosed. Hydrolysis of these linkages on oligosaccharides produces substrates for further N-glycan processing in the secretory pathway.
    Type: Application
    Filed: September 21, 2012
    Publication date: October 10, 2013
    Inventor: Stephen Hamilton
  • Patent number: 8298811
    Abstract: A method for producing human-like glycoproteins by expressing a Class 2 ?-mannosidase having a substrate specificity for Man?1,3 and Man?1,6 glycosidic linkages in a lower eukaryote is disclosed. Hydrolysis of these linkages on oligosaccharides produces substrates for further N-glycan processing in the secretory pathway.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: October 30, 2012
    Assignee: Glycofi, Inc.
    Inventor: Stephen Hamilton
  • Patent number: 8299228
    Abstract: A method for producing human-like glycoproteins by expressing a Class 2 ?-mannosidase having a substrate specificity for Man?1,3 and Man?1,6 glycosidic linkages in a lower eukaryote is disclosed. Hydrolysis of these linkages on oligosaccharides produces substrates for further N-glycan processing in the secretory pathway.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: October 30, 2012
    Assignee: Glycofi, Inc.
    Inventor: Stephen Hamilton
  • Publication number: 20120232007
    Abstract: Methods for producing proteins and glycoproteins in Pichia pastoris that lack detectable cross binding activity to antibodies made against host cell antigens are described. In particular, methods are described wherein recombinant Pichia pastoris strains that do not display a ?-mannosyltransferase 2 activity with respect to an N-glycan or O-glycan and do not display at least one activity selected from a ?-mannosyltransferase 1, 3, and 4 activity to produce recombinant proteins and glycoproteins. These recombinant Pichia pastoris strains can produce proteins and glycoproteins that lack detectable ?-mannosidase resistant ?-mannose residues thereon and thus, lack cross binding activity to antibodies against host cell antigens. Further described are methods for producing bi-sialylated human erythropoietin in Pichia pastoris that lack detectable cross binding activity to antibodies against host cell antigens.
    Type: Application
    Filed: October 11, 2010
    Publication date: September 13, 2012
    Applicant: MERCK SHARP & DOHME CORP
    Inventors: Piotr Bobrowicz, Sujatha Gomathinayagam, Stephen Hamilton, Huijuan Li, Natarajan Sethuraman, Terrance A. Stadheim, Stefan Wildt
  • Publication number: 20120064568
    Abstract: The present invention generally relates to methods of modifying the glycosylation structures of recombinant proteins expressed in fungi or other lower eukaryotes, to more closely resemble the glycosylation of proteins from higher mammals, in particular humans. The present invention also relates to novel enzymes and, nucleic acids encoding them and, hosts engineered to express the enzymes, methods for producing modified glycoproteins in hosts and modified glycoproteins so produced.
    Type: Application
    Filed: March 24, 2011
    Publication date: March 15, 2012
    Applicant: Glycofi, Inc.
    Inventor: Stephen Hamilton
  • Patent number: 8024697
    Abstract: Methods and apparatuses are described for an Intellectual Property (IP) Generator for estimating timing, area, and power characteristics of an electronic system design. The IP Generator receives a user-supplied file having data describing a configuration of an IP design having multiple levels of hierarchy. The IP Generator also receives user-supplied technology parameters and data-flow information. The IP generator correlates estimated timing, area, and power characteristics for each IP sub component based on the user supplied technology parameters, data-flow information and configuration parameters. The IP generator reports the timing, area, and power estimates to a user via a graphic user interface prior to a transformation of a Register Transfer Level (RTL) design into the gate-level circuit design.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: September 20, 2011
    Assignee: Sonics, Inc.
    Inventors: Stephen Hamilton, Ian Andrew Swarbrick, Scott Carlton Evans, Wolf-Dietrich Weber, Jay S. Tomlinson
  • Patent number: 8007016
    Abstract: A riser kit for a grease interceptor having upwardly extending walls, an open top and a cover to close the open top. The riser kit comprises at least one collar extension having, a lower edge for engaging an upper edge of the upwardly extending walls of the grease interceptor, a middle portion forming an upward wall extension for the grease interceptor, and, a top edge sized and shaped to engage the cover to permit the cover to be secured to the extended grease interceptor. The riser kit also has a means to secure the collar extension to the grease interceptor. Also disclosed is a latch assembly for securing a cover onto a container, the latch assembly comprising a catch member secured to the container transverse to a container wall at an upper end thereof, a latch member pivotally mounted to the cover adjacent an edge thereof and positioned to register with the catch member.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: August 30, 2011
    Assignee: Canplas Industries Ltd
    Inventors: James Mantyla, Rick Parkinson, Stephen Hamilton
  • Publication number: 20100318946
    Abstract: Methods and apparatuses are described for an Intellectual Property (IP) Generator for estimating timing, area, and power characteristics of an electronic system design. The IP Generator receives a user-supplied file having data describing a configuration of an IP design having multiple levels of hierarchy. The IP Generator also receives user-supplied technology parameters and data-flow information. The IP generator correlates estimated timing, area, and power characteristics for each IP sub component based on the user supplied technology parameters, data-flow information and configuration parameters. The IP generator reports the timing, area, and power estimates to a user via a graphic user interface prior to a transformation of a Register Transfer Level (RTL) design into the gate-level circuit design.
    Type: Application
    Filed: March 23, 2010
    Publication date: December 16, 2010
    Applicant: Sonics, Inc.
    Inventors: Stephen Hamilton, Ian Andrew Swarbrick, Scott Carlton Evans, Wolf-Dietrich Weber, Jay S. Tomlinson
  • Patent number: D830937
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 16, 2018
    Inventor: Stephen Hamilton
  • Patent number: D830941
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 16, 2018
    Inventor: Stephen Hamilton
  • Patent number: D876310
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: February 25, 2020
    Assignee: ARKON WHEELS, LLC
    Inventor: Stephen Hamilton
  • Patent number: D877027
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: March 3, 2020
    Assignee: Arkon Wheels, LLC
    Inventor: Stephen Hamilton
  • Patent number: D887936
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: June 23, 2020
    Assignee: Arkon Wheels, LLC
    Inventor: Stephen Hamilton