Granted Patent
Utility
US 5,233,821 · App. 07/660,497
Protective garment containing polybenzazole
Inventors:
Charles P. Weber, Jr., David A. Dalman
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Feb 25, 1991
Inventors
Charles P. Weber, Jr.
David A. Dalman
Assignee (at issue)
THE DOW CHEMICAL 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.