Granted Patent
Utility
US 4,859,672 · App. 06/925,008
Pyrido[2,3-d]pyrimidinone and imidazo[4,5-b]pyrimidinone
Inventors:
Alfred P. Spada, Henry F. Campbell, Donald E. Kuhla, William L. Studt, William C. Faith, Bruce F. Molino
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Oct 29, 1986
Inventors
Alfred P. Spada
Henry F. Campbell
Donald E. Kuhla
William L. Studt
William C. Faith
Bruce F. Molino
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.