Granted Patent
Utility
US 6,417,175 · App. 09/555,949
Phosphonocephem derivatives, process for the preparation of the same, and use thereof
Inventors:
Tomoyasu ISHIKAWA, Shohei Hashiguchi, Yuji Iizawa
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Jun 6, 2000
Inventors
Tomoyasu ISHIKAWA
Shohei Hashiguchi
Yuji Iizawa
Assignee (at issue)
Takeda Chemical Industries Ltd.
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.