Granted Patent
Utility
US 6,297,248 · App. 09/284,019
1-aryl-1,8-naphthylidin-4-one derivative as type IV phosphodiesterase inhibitor
Inventors:
Tetsuo Shimamoto, Hidekazu Inoue, Yasuhiro Hayashi
Patented Case
View Patent ↗
Granted: Oct 2, 2001
Filed: Apr 6, 1999
Inventors
Tetsuo Shimamoto
Hidekazu Inoue
Yasuhiro Hayashi
Assignee (at issue)
SUNTORY HOLDINGS LIMITED
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.