Granted Patent
Utility
US 5,716,640 · App. 08/705,348
Method of producing sustained-release microcapsules
Inventors:
Shigeru Kamei, Minoru Yamada, Yasuaki Ogawa
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Aug 29, 1996
Inventors
Shigeru Kamei
Minoru Yamada
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.