Granted Patent
Utility
US 4,965,358 · App. 07/269,916
N,N'-carbonyl-bis-(4-ethyl-2,3-dioxo)-piperazine
Inventors:
Juan Cabre Castellvi, Jose Diago Meseguer, Asuncion Esteve Bianchini, Carlos E. Lenhardt Padro, Esteve Sans Pitarch
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Nov 10, 1988
Inventors
Juan Cabre Castellvi
Jose Diago Meseguer
Asuncion Esteve Bianchini
Carlos E. Lenhardt Padro
Esteve Sans Pitarch
Assignee (at issue)
GeMa, S.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.