Granted Patent
Utility
US 6,150,477 · App. 08/880,228
Process for the preparation of hydrophilic hydrogels of high swelling capacity
Inventors:
Fritz Engelhardt, Manfred Mayer, Uwe Nickel
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Jun 23, 1997
Inventors
Fritz Engelhardt
Manfred Mayer
Uwe Nickel
Assignee (at issue)
Hoechst GmbH
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.