Granted Patent
Utility
US 5,120,719 · App. 07/437,463
Conjugate of prostaglandin and polysaccharide
Inventors:
Kiyoshi Iwamoto, Masahiro Kawahara, Sumio Watanabe, Yasuo Miyake, Fumio Sagami
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Nov 15, 1989
Inventors
Kiyoshi Iwamoto
Masahiro Kawahara
Sumio Watanabe
Yasuo Miyake
Fumio Sagami
Assignee (at issue)
Eisai Inc.
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.