Granted Patent
Utility
US 6,682,577 · App. 09/985,035
Soil modifier
Inventors:
Yasuyuki Yamaguchi, Takuya Tsubota, Yutaka Yamauchi, Ryoichi Nagata
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Nov 1, 2001
Inventors
Yasuyuki Yamaguchi
Takuya Tsubota
Yutaka Yamauchi
Ryoichi Nagata
Assignee (at issue)
JFE Steel Corporation
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.