Granted Patent
Utility
US 4,783,540 · App. 07/079,057
Solid solutions of pyrrolo-(3,4-C)-pyrrols
Inventor:
Fridolin Babler
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: Jul 29, 1987
Inventor
Fridolin Babler
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.