Granted Patent
Utility
US 6,589,553 · App. 09/905,712
Controlled release oral dosage form
Inventors:
Boyong Li, Avinash Nangia, Chih-Ming Chen
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Feb 8, 2001
Inventors
Boyong Li
Avinash Nangia
Chih-Ming Chen
Assignee (at issue)
Andrx Pharmaceuticals, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.