Granted Patent
Utility
US 6,340,388 · App. 09/547,615
Strengthened, light weight wallboard and method and apparatus for making the same
Inventor:
Joseph S. Luongo
Patented Case
View Patent ↗
Granted: Jan 22, 2002
Filed: Apr 12, 2000
Inventor
Joseph S. Luongo
Assignee (at issue)
Advanced Construction Materials Corp.
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.