Granted Patent
Utility
US 5,226,902 · App. 07/737,675
Pulsatile drug delivery device using stimuli sensitive hydrogel
Inventors:
You Han Bae, Sung Wan Kim, Lev I. Valuev
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jul 30, 1991
Inventors
You Han Bae
Sung Wan Kim
Lev I. Valuev
Assignee (at issue)
THE UNIVERSITY OF UTAH
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.