Granted Patent
Utility
US 6,066,658 · App. 09/252,913
Condensed 4,5,6,7-tetrahydrobenzo[C]thiophenes as enhancer for cell differentiation induction factor action
Inventors:
Tsuneo Yasuma, Tsuneo Oda, Masatoshi Hazama, Shigehisa Taketomi
Patented Case
View Patent ↗
Granted: May 23, 2000
Filed: Feb 19, 1999
Inventors
Tsuneo Yasuma
Tsuneo Oda
Masatoshi Hazama
Shigehisa Taketomi
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.