Granted Patent
Utility
US 6,372,252 · App. 09/559,542
Guaifenesin sustained release formulation and tablets
Inventors:
Ralph W. Blume, Robert D. Davis, Donald Jeffrey Keyser
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Apr 28, 2000
Inventors
Ralph W. Blume
Robert D. Davis
Donald Jeffrey Keyser
Assignee (at issue)
Adams Laboratories, 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.