Granted Patent
Utility
US 5,334,138 · App. 07/653,204
Method and composition for increased skin concentration of active agents by iontophoresis
Inventors:
Burton H. Sage, Jr., Jim E. Riviere
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Feb 8, 1991
Inventors
Burton H. Sage, Jr.
Jim E. Riviere
Assignees (at issue)
NORTH CAROLINA STATE UNIVERSITY
BECTON, DICKINSON AND COMPANY
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.