Granted Patent
Utility
US 6,528,093 · App. 09/386,232
Sustained-release preparation
Inventors:
Shigeru Kamei, Yasutaka Igari, Yasuaki Ogawa
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Aug 31, 1999
Inventors
Shigeru Kamei
Yasutaka Igari
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.