Granted Patent
Utility
US 5,948,557 · App. 08/942,497
Very thin microporous material
Inventors:
Raymond R. Ondeck, Richard W. Pekala, Richard A. Schwarz, Robert C. Wang
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Oct 2, 1997
Inventors
Raymond R. Ondeck
Richard W. Pekala
Richard A. Schwarz
Robert C. Wang
Assignee (at issue)
PPG 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.