Granted Patent
Utility
US 5,246,767 · App. 07/449,000
High light-transmissive dust-proof body and method of preparing same
Inventors:
Tokinori Agou, Hiroaki Nakagawa
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Dec 12, 1989
Inventors
Tokinori Agou
Hiroaki Nakagawa
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.