Granted Patent
Utility
US 5,607,758 · App. 08/493,145
Smoke containment curtain
Inventor:
William C. Schwartz
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Jun 21, 1995
Inventor
William C. Schwartz
Assignee (at issue)
BGF Industries, 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.