Granted Patent
Utility
US 6,139,958 · App. 08/196,819
Chemically treated glass fibers for reinforcing thermosetting polymer matrices
Inventors:
Narasimhan Raghupathi, Philip L. Schell, James C. Watson, David T. Melle
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Feb 14, 1994
Inventors
Narasimhan Raghupathi
Philip L. Schell
James C. Watson
David T. Melle
Assignee (at issue)
PPG Industries Ohio, 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.