Granted Patent
Utility
US 5,651,990 · App. 08/387,392
Prolonged release microparticle preparation and production of the same
Inventors:
Shigeyuki Takada, Yoshiaki Uda, Yasuaki Ogawa
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Feb 13, 1995
Inventors
Shigeyuki Takada
Yoshiaki Uda
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.