Granted Patent
Utility
US 4,051,245 · App. 05/732,982
Pyrazine 4-oxide derivatives and process for their preparation
Inventors:
Vittorio Ambrogi, Willy Logemann, Marc'Antonio Parenti, Raffaele Tommasini
Patented Case
View Patent ↗
Granted: Sep 27, 1977
Filed: Oct 15, 1976
Inventors
Vittorio Ambrogi
Willy Logemann
Marc'Antonio Parenti
Raffaele Tommasini
Assignee (at issue)
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.