Granted Patent
Utility
US 6,441,163 · App. 09/867,598
Methods for preparation of cytotoxic conjugates of maytansinoids and cell binding agents
Inventors:
Ravi V. J. Chari, Wayne C. Widdison
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: May 31, 2001
Inventors
Ravi V. J. Chari
Wayne C. Widdison
Assignee (at issue)
IMMUNOGEN, 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.