Granted Patent
Utility
US 6,197,350 · App. 09/308,971
Method of producing a sustained-release preparation
Inventors:
Yutaka Yamagata, Masafumi Misaki, Susumu Iwasa
Patented Case
View Patent ↗
Granted: Mar 6, 2001
Filed: May 27, 1999
Inventors
Yutaka Yamagata
Masafumi Misaki
Susumu Iwasa
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.