Granted Patent
Utility
US 5,554,797 · App. 08/399,686
Tetra (hydroxphenyl) alkanes
Inventors:
Reinhard Schulz, Norbert M unzel, Martin Roth, Wilhelm Knobloch
Patented Case
View Patent ↗
Granted: Sep 10, 1996
Filed: Mar 7, 1995
Inventors
Reinhard Schulz
Norbert M unzel
Martin Roth
Wilhelm Knobloch
Assignee (at issue)
OCG Microelectronic Materials, Inc.
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.