Granted Patent
Utility
US 4,983,200 · App. 07/406,476
Glass shaping ring having a thermal insulating member and method of shaping glass sheets using same
Inventors:
Thomas J. Reese, David B. Rayburn
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Sep 13, 1989
Inventors
Thomas J. Reese
David B. Rayburn
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.