Granted Patent
Utility
US 6,696,500 · App. 09/867,627
Sustained-release preparation
Inventors:
Yoshio Hata, Hikaru Taira, Jun Sato, Satoshi Iinuma
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: May 31, 2001
Inventors
Yoshio Hata
Hikaru Taira
Jun Sato
Satoshi Iinuma
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.