Granted Patent
Utility
US 4,863,921 · App. 07/186,824
Dibenzofurancarboxamides and their pharmaceutical compositions and methods
Inventors:
Raymond D. Youssefyeh, Henry F. Campbell, Donald E. Kuhla
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Apr 27, 1988
Inventors
Raymond D. Youssefyeh
Henry F. Campbell
Donald E. Kuhla
Assignee (at issue)
Rorer Pharmaceutical Corporation
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.