Patents by Inventor Stephen G. Spanton

Stephen G. Spanton 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).

  • 6-O-methylerythromycin A crystal form III
    Patent number: 6627743
    Abstract: The present invention relates to a novel 6-O-methylerythromycin A crystal form, a process for preparing the crystal form, and methods for using the crystal form to prepare a 6-O-methylerythromycin A crystal form II.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: September 30, 2003
    Assignee: Abbott Laboratories
    Inventors: Jih-Hua Liu, Rodger F. Henry, Stephen G. Spanton, David A. Riley
  • Crystal form O of clarithromycin
    Patent number: 5945405
    Abstract: The present invention concerns the novel antiobiotic 6-O-methylerythromycin A form O solvate, a process for its preparation, pharmaceutical compositions comprising this compound and a method of use as a therapeutic agent.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: August 31, 1999
    Assignee: Abbott Laboratories
    Inventors: Stephen G. Spanton, Rodger F. Henry, David A. Riley, Jih-Hua Liu
  • Terazosin monohydrochloride and processes and intermediate for its production
    Patent number: 5412095
    Abstract: The present invention provides a non-solvated crystalline polymorph of terazosin monohydrochloride designated Form III and methods for its preparation. Also disclosed is terazosin monohydrochloride methanolate and processes for its production as well as processes for its conversion to other crystalline forms of terazosin monohydrochloride.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: May 2, 1995
    Assignee: Abbott Laboratories
    Inventors: James A. Morley, John F. Bauer, Ramesh F. Patel, Rodger E. Henry, Stephen G. Spanton