Granted Patent
Utility
US 5,112,912 · App. 07/697,511
Process for modifying acrylate copolymers
Inventor:
Erwin Nikles
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Apr 29, 1991
Inventor
Erwin Nikles
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.