Granted Patent
Utility
US 4,476,304 · App. 06/409,809
Process for the purification of riboflavine-5'-monophosphate
Inventors:
Kenji Yokota, Hiroshi Kusano, Ryuichi Sugimoto
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Aug 20, 1982
Inventors
Kenji Yokota
Hiroshi Kusano
Ryuichi Sugimoto
Assignees (at issue)
Mitsubishi Chemical Industries, Ltd.
WAKAMOTO PHARMACEUTICAL CO., 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.