Granted Patent
Utility
US 5,830,889 · App. 07/971,829
Antibacterial penem esters derivatives
Inventors:
Hiromitsu Iwata, Takashi Nakatsuka, Rie Tanaka, Masaji Ishiguro
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Feb 19, 1993
Inventors
Hiromitsu Iwata
Takashi Nakatsuka
Rie Tanaka
Masaji Ishiguro
Assignee (at issue)
SUNTORY HOLDINGS LIMITED
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.