Granted Patent
Utility
US 4,861,861 · App. 07/082,706
Saturated polyesters containing imide groups and terminal carboxyl groups
Inventor:
Claudio A Gabutti
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Aug 7, 1987
Inventor
Claudio A Gabutti
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.