Granted Patent
Utility
US 5,843,957 · App. 08/978,146
Naphthyridine derivatives
Inventors:
Masami Muraoka, Katsuhisa Ioriya, Naohito Ohashi, Hideki Yagi
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Nov 25, 1997
Inventors
Masami Muraoka
Katsuhisa Ioriya
Naohito Ohashi
Hideki Yagi
Assignee (at issue)
Sumitomo Pharmaceuticals Company Limited
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.