Granted Patent
Utility
US 4,325,721 · App. 06/193,201
High pressure modular forehearth
Inventor:
Thomas H. Jensen
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Oct 2, 1980
Inventor
Thomas H. Jensen
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.