Granted Patent
Utility
US 4,954,438 · App. 07/397,061
Process for preparing antibiotics D788-7
Inventors:
Akihiro Yoshimoto, Osamu Jodo, Yoshio Watanabe, Rokuro Okamoto, Tomio Takeuchi
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Aug 21, 1989
Inventors
Akihiro Yoshimoto
Osamu Jodo
Yoshio Watanabe
Rokuro Okamoto
Tomio Takeuchi
Assignee (at issue)
Sanraku Incorporated
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.