Granted Patent
Utility
US 4,371,533 · App. 06/306,776
4,5-Deoxymaytansinoids, their use and pharmaceutical compositions thereof
Inventors:
Hiroshi Akimoto, Akiyoshi Kawai
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Sep 29, 1981
Inventors
Hiroshi Akimoto
Akiyoshi Kawai
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.