Granted Patent
Utility
US 5,518,893 · App. 08/212,633
Quick biochemical oxygen demand test and apparatus for the same
Inventors:
Yong-Seok Park, Hyung-Charn Kim, Sung Hong KIM, Yong Yi
Patented Case
View Patent ↗
Granted: May 21, 1996
Filed: Mar 11, 1994
Inventors
Yong-Seok Park
Hyung-Charn Kim
Sung Hong KIM
Yong Yi
Assignee (at issue)
Yukong Limited
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.