Patents by Inventor Stephen Withers

Stephen Withers 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: 8815941
    Abstract: Compounds of structural formula (I) useful for the treatment or prophylaxis of viral infection, particularly viral influenza are provided Pharmaceutical preparations thereof and methods for their preparation are also described. The therapeutic effect is achieved via inhibition of viral neuraminidases, also known as viral sialidases. These neuraminidases are classified under the GH34 family of viral enzymes.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: August 26, 2014
    Assignee: The University of British Columbia
    Inventors: Stephen Withers, Andrew Graham Watts, Jin Hyo Kim, Tom Wennekes
  • Patent number: 8776470
    Abstract: A wall repair apparatus, system, and method to repair localized wall damage and easily support an installed wall repair patch are disclosed. The disclosed embodiments provide a convenient way to both position and align a wall repair patch with the outer face of the wall surface and support it in place from within the wall cavity. The wall repair apparatus supports and reinforces a wall repair patch to prevent the wall repair patch from moving within a repaired wall, thus causing further damage. The wall repair apparatus comprises a female interlocking member and a male interlocking member that are appropriately sized to securely fit inside of a wall cavity, behind a wall repair patch. A male interlocking member with annular rings is sized to fit within a female interlocking member to form a tension-fitted wall repair apparatus that spans a wall cavity and supports a wall repair patch.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: July 15, 2014
    Inventors: Ted J. Karam, Jason Rubio, Stephen Withers
  • Publication number: 20140147891
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Application
    Filed: July 24, 2013
    Publication date: May 29, 2014
    Applicants: The University of British Columbia University- Industry Liaison Office, Seneb BioSciences, Inc.
    Inventors: Karl F. Johnson, Shawn Defrees, Stephen Withers, Mark Vaughan
  • Patent number: 8431541
    Abstract: Particular naturally occurring glycosylated acyl-flavonols are now shown to be effective mammalian ?-amylase inhibitors. Such compounds can be obtained from plants of the genus Crocosmia and the compounds are useful in controlling starch digestion such as for management of glycemia in pre-diabetic or diabetic subjects, for management of obesity or for inhibiting oral caries or plaque formation.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: April 30, 2013
    Assignee: The University of British Columbia
    Inventors: Stephen Withers, Andrew C. Tarling, Raymond Andersen, Gary D. Brayer, Katherine Woods
  • Publication number: 20120184606
    Abstract: Compounds having a structure of Formula I and compositions comprising these compounds are provided. Uses of such compounds and compositions are provided for treatment or prophylaxis of viral infection. In particular, compounds and compositions may be for use in the treatment or prophylaxis of viral influenza.
    Type: Application
    Filed: January 19, 2012
    Publication date: July 19, 2012
    Inventors: Stephen Withers, Andrew Graham Watts, Jin Hyo Kim, Tom Wennekes
  • Publication number: 20120178802
    Abstract: Compounds of structural formula (I) useful for the treatment or prophylaxis of viral infection, particularly viral influenza are provided Pharmaceutical preparations thereof and methods for their preparation are also described. The therapeutic effect is achieved via inhibition of viral neuraminidases, also known as viral sialidases. These neuraminidases are classified under the GH34 family of viral enzymes.
    Type: Application
    Filed: July 15, 2010
    Publication date: July 12, 2012
    Inventors: Stephen Withers, Andrew Graham Watts, Jin Hyo Kim, Tom Wennekes
  • Publication number: 20110277412
    Abstract: A wall repair apparatus, system, and method to repair localized wall damage and easily support an installed wall repair patch are disclosed. The disclosed embodiments provide a convenient way to both position and align a wall repair patch with the outer face of the wall surface and support it in place from within the wall cavity. The wall repair apparatus supports and reinforces a wall repair patch to prevent the wall repair patch from moving within a repaired wall, thus causing further damage. The wall repair apparatus comprises a female interlocking member and a male interlocking member that are appropriately sized to securely fit inside of a wall cavity, behind a wall repair patch. A male interlocking member with annular rings is sized to fit within a female interlocking member to form a tension-fitted wall repair apparatus that spans a wall cavity and supports a wall repair patch.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 17, 2011
    Inventors: Ted J. Karam, Jason Rubio, Stephen Withers
  • Publication number: 20110189107
    Abstract: Particular naturally occurring glycosylated acyl-flavonols, e.g.
    Type: Application
    Filed: October 16, 2008
    Publication date: August 4, 2011
    Applicant: The University of British Columbia
    Inventors: Stephen Withers, Andrew C. Tarling, Raymond Andersen, Gary D. Brayer, Katherine Woods
  • Publication number: 20090170155
    Abstract: The present invention relates to a novel endoglycoceramidase whose hydrolytic activity has been substantially reduced or eliminated, such that the enzyme is useful for synthesis of glycolipids from a monosaccharide or oligosaccharide and a ceramide. More specifically, the endoglycoceramidase is a mutant version of a naturally occurring endoglycoceramidase, preferably comprising a mutation within the active site or the nucleophilic site of the enzyme and more preferably comprising a substitution mutation of the Glu residue within the active site or the nucleophilic site. Also disclosed are a method for generating the mutant endoglycoceramidase and a method for enzymatically synthesizing glycolipids using this mutant enzyme.
    Type: Application
    Filed: June 1, 2005
    Publication date: July 2, 2009
    Applicant: THE UNIVERSITY OF BRITISH COLUMBIA UNIVERSITY-INDU
    Inventors: Karl F. Johnson, Shawn Defrees, Stephen Withers, Mark Vaughan
  • Publication number: 20070066543
    Abstract: The invention provides a method for treating an animal suffering from a disease associated with reduced activity of a lysosomal hexosaminidase by administering to the animal an effective amount of a compound which increases the activity of the hexosaminidase.
    Type: Application
    Filed: May 21, 2004
    Publication date: March 22, 2007
    Applicants: The Hospital For Sick Children, The University Of British Columbia
    Inventors: Don Mahuran, Michael Tropak, Stephen Withers
  • Publication number: 20070004010
    Abstract: Mutant glycosidases in which the amino acid in the active site that serves as the acid, base or acid/base-catalyst is converted from a carboxylic acid to some other amino acid (for example to a simple alkyl, as in alanine or glycine) can catalyze the reaction of a thiosugar acceptor and an activated donor to form a thioglycoside. The “thioglycoligases” represent a novel class of mutant enzymes, and represent a first aspect of the invention. Thioglycoligases can be used in accordance with the method of the invention to couple a thiosugar acceptor and an activated donor to form a thioglycoside. By selection of the donor and acceptor species, as well as the specific enzyme employed, thioglycosides of different structure and stereochemistry can be obtained.
    Type: Application
    Filed: August 22, 2006
    Publication date: January 4, 2007
    Applicant: THE UNIVERSITY OF BRITISH COLUMBIA
    Inventors: Stephen Withers, Michael Jahn
  • Publication number: 20060035342
    Abstract: Mutant glycosidases in which the amino acid in the active site that serves as the acid, base or acid/base-catalyst is converted from a carboxylic acid to some other amino acid (for example to a simple alkyl, as in alanine or glycine) can catalyze the reaction of a thiosugar acceptor and an activated donor to form a thioglycoside. The “thioglycoligases” represent a novel class of mutant enzymes, and represent a first aspect of the invention. Thioglycoligases can be used in accordance with the method of the invention to couple a thiosugar acceptor and an activated donor to form a thioglycoside. By selection of the donor and acceptor species, as well as the specific enzyme employed, thioglycosides of different structure and stereochemistry can be obtained.
    Type: Application
    Filed: September 12, 2003
    Publication date: February 16, 2006
    Inventors: Stephen Withers, Michael Jahn