Granted Patent
Utility
US 4,579,949 · App. 06/493,533
Preparation of pyrrolo[3,4-c]pyrroles
Inventors:
Alain C. Rochat, Luigi Cassar, Abul Iqbal
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: May 11, 1983
Inventors
Alain C. Rochat
Luigi Cassar
Abul Iqbal
Assignee (at issue)
Ciba-Geigy
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.