Granted Patent
Utility
US 6,187,788 · App. 09/164,349
Condensed-ring thiophene derivatives, their production and use
Inventors:
Shuichi Furuya, Nobuo Choh, Koichi Kato, Shuji Hinuma
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Oct 1, 1998
Inventors
Shuichi Furuya
Nobuo Choh
Koichi Kato
Shuji Hinuma
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.