Granted Patent
Utility
US 4,476,193 · App. 06/417,963
Sulfur containing lignin modified alkaline earth treated phenolic impregnating resins for core layers of humidity resistant laminates
Inventors:
Martin Seidel, Timothy J. Fuller
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Sep 14, 1982
Inventors
Martin Seidel
Timothy J. Fuller
Assignee (at issue)
Westinghouse Electric Company LLC
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.