Granted Patent
Utility
US 5,861,173 · App. 08/755,381
Long-lasting release nifedipine preparation
Inventors:
Takaaki Nishioka, Kenji Kuratani, Haruo Kanasaki, Helmut Luchtenberg, Ulrich Tenter, Andreas Ohm
Patented Case
View Patent ↗
Granted: Jan 19, 1999
Filed: Nov 21, 1996
Inventors
Takaaki Nishioka
Kenji Kuratani
Haruo Kanasaki
Helmut Luchtenberg
Ulrich Tenter
Andreas Ohm
Assignee (at issue)
Bayer Aktiengesellschaft
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.