Granted Patent
Utility
US 4,965,026 · App. 07/297,020
Process for hydroxylating hydrophobic polymer surfaces
Inventor:
Robert Allen Janssen
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Jan 13, 1989
Inventor
Robert Allen Janssen
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.