Granted Patent
Utility
US 4,646,498 · App. 06/804,629
Curtain wall panel and method
Inventors:
Joseph W. Schneller, Donald A. Kossuth, J. Stephen Robinson
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Dec 5, 1985
Inventors
Joseph W. Schneller
Donald A. Kossuth
J. Stephen Robinson
Assignee (at issue)
National Gypsum Company
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.