Granted Patent
Utility
US 6,180,652 · App. 09/433,786
Sulfoxide compounds and acetone complexes, and a process for producing the same
Inventors:
Masahiko Tsujii, Nobuo Niikawa, Keizo Takayanagi, Shigeharu Nochi
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Nov 3, 1999
Inventors
Masahiko Tsujii
Nobuo Niikawa
Keizo Takayanagi
Shigeharu Nochi
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.