Granted Patent
Utility
US 5,030,403 · App. 07/492,274
Method for making polymeric fibrils
Inventors:
Stanley R. Pickens, Donald W. DuBois, Hou-Ching M. Yang
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Mar 7, 1990
Inventors
Stanley R. Pickens
Donald W. DuBois
Hou-Ching M. Yang
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.