Granted Patent
Utility
US 5,539,113 · App. 08/161,533
Pyrrolopyrimidine derivatives, their production
Inventors:
Hiroshi Akimoto, Takenori Hitaka, Tetsuo Miwa
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Dec 6, 1993
Inventors
Hiroshi Akimoto
Takenori Hitaka
Tetsuo Miwa
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.