Granted Patent
Utility
US 4,699,822 · App. 06/771,527
Fireproofed metal structural members and method of fabricating same
Inventor:
Larry S. Shu
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Aug 30, 1985
Inventor
Larry S. Shu
Assignee (at issue)
W. R. Grace & Co.
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.