Granted Patent
Utility
US 4,311,507 · App. 06/170,471
Special entrance slit module and method for quenching glass sheets
Inventors:
Eugene W. Starr, George B. Shields
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: Jul 21, 1980
Inventors
Eugene W. Starr
George B. Shields
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.