Granted Patent
Utility
US 5,481,834 · App. 08/224,953
Fire-rated panel
Inventors:
Stanley Kowalczyk, Todd A. Williams, James D. Petzrick, Charles E. Williams
Patented Case
View Patent ↗
Granted: Jan 9, 1996
Filed: Apr 8, 1994
Inventors
Stanley Kowalczyk
Todd A. Williams
James D. Petzrick
Charles E. Williams
Assignee (at issue)
Hufcor, 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.