Granted Patent
Utility
US 4,398,979 · App. 06/350,892
Vacuum channel method of laminating glass sheets
Inventors:
William P. Cathers, John S. Ferretti
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Feb 22, 1982
Inventors
William P. Cathers
John S. Ferretti
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.