Granted Patent
Utility
US 4,689,277 · App. 06/804,767
Rare earth phosphor and radiographic image conversion screen
Inventors:
Yukinori Minagawa, Minoru Tanaka, Keiko Matsuo, Etsuo Shimizu
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Dec 5, 1985
Inventors
Yukinori Minagawa
Minoru Tanaka
Keiko Matsuo
Etsuo Shimizu
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.