Granted Patent
Utility
US 6,368,635 · App. 08/993,314
Gastrointestinal mucosa-adherent matrixes pharmaceutical preparations and a coating composition
Inventors:
Yohko Akiyama, Naoki Nagahara, Shin-ichiro Hirai
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Dec 18, 1997
Inventors
Yohko Akiyama
Naoki Nagahara
Shin-ichiro Hirai
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.