Patents by Inventor Charles Billington

Charles Billington 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).

  • Tetracyclic compounds for enhancing biosynthesis of erythropoietin, compositions containing same, and methods of use thereof
    Patent number: 5985913
    Abstract: The present invention provides a compound in substantially pure form having the structure: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 may independently be hydrogen, halogen, nitro, CF.sub.3, hydroxy, C.sub.1-5 alkyl, aryl or OR.sub.9, wherein R.sub.9 is C.sub.1-5 alkyl, wherein R.sub.10 is COC.sub.1-5 alkyl; or wherein any two consecutive R groups may be members of a C.sub.5 -C.sub.6 membered ring, and wherein the intracyclic-dashed line represents a covalent bond which may be present or absent, with the proviso that when R.sub.10 is present, the exocyclic-covalent bond is absent, and when R.sub.10 is absent, the exocyclic-covalent bond is present, and with the proviso that when R.sub.10 is absent, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 cannot all be hydrogen and when R.sub.10 is absent, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 cannot all be hydrogen when either R.sub.1, R.sub.2, R.sub.3, or R.sub.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: November 16, 1999
    Assignee: OSI Pharmaceuticals, Inc.
    Inventors: Jonathan Gareth Williams, David R. Houck, David Edward Smith, Daniel Lee Rathbone, David Charles Billington, Bernard T. Golding, Eric W. Collington, John Kitchin, Nicholas Rich
  • USB memory device
    Patent number: D685807
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: July 9, 2013
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D685808
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: July 9, 2013
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D685809
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: July 9, 2013
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D707689
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: June 24, 2014
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D707690
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: June 24, 2014
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • Portable loud speaker
    Patent number: D737246
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 25, 2015
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • Portable loud speaker
    Patent number: D737247
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 25, 2015
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • Portable loud speaker
    Patent number: D737248
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 25, 2015
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D754139
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: April 19, 2016
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D754140
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: April 19, 2016
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D754141
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: April 19, 2016
    Assignee: Groundhog S.A.
    Inventor: Charles Billington
  • USB memory device
    Patent number: D767580
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: September 27, 2016
    Assignee: Groundhog S.A.
    Inventor: Charles Billington