Granted Patent
Utility
US 5,591,713 · App. 08/377,392
Water-soluble composition for sustained-release
Inventors:
Yasutaka Igari, Minoru Yamada, Yasuaki Ogawa
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Jan 24, 1995
Inventors
Yasutaka Igari
Minoru Yamada
Yasuaki Ogawa
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.