Granted Patent
Utility
US 4,497,820 · App. 06/491,386
Substituted iminoderivatives of dihydrobenzopyran and dihydrobenzothiopyran
Inventors:
Lucio Merlini, Alessandro Rossi, Metilde Buonamici
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: May 4, 1983
Inventors
Lucio Merlini
Alessandro Rossi
Metilde Buonamici
Assignee (at issue)
Farmitalia Carlo Erba S.p.A.
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.