Granted Patent
Utility
US 6,113,943 · App. 08/962,347
Sustained-release preparation capable of releasing a physiologically active substance
Inventors:
Hiroaki Okada, Yayoi Douken
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Oct 31, 1997
Inventors
Hiroaki Okada
Yayoi Douken
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.