Granted Patent
Utility
US 4,933,439 · App. 07/272,601
Tylosin derivatives and processes for producing the same
Inventors:
Takeo Yoshioka, Azuma Watanabe, Hiroyuki Chiba, Kaichiro Kominato, Kohki Kiyoshima, Yasuo Fukagawa, Hiroshi Tone, Rokuro Okamoto
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Nov 17, 1988
Inventors
Takeo Yoshioka
Azuma Watanabe
Hiroyuki Chiba
Kaichiro Kominato
Kohki Kiyoshima
Yasuo Fukagawa
Hiroshi Tone
Rokuro Okamoto
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.