Granted Patent
Utility
US 4,473,518 · App. 06/399,116
Process for preparing a phosphor
Inventors:
Yukinori Minagawa, Masachika Yaguchi
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Jul 16, 1982
Inventors
Yukinori Minagawa
Masachika Yaguchi
Assignees (at issue)
Mitsubishi Chemical Industries, Ltd.
Kasei Optonix, 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.