Granted Patent
Utility
US 6,034,239 · App. 08/812,168
Tricyclic compounds, their production and use
Inventors:
Shigenori Ohkawa, Osamu Uchikawa, Kohji Fukatsu, Masaomi Miyamoto
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: Mar 6, 1997
Inventors
Shigenori Ohkawa
Osamu Uchikawa
Kohji Fukatsu
Masaomi Miyamoto
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.