Granted Patent
Utility
US 6,573,336 · App. 09/367,799
Wastewater treating agent, method for wastewater treatment, sludge dehydrant and method for sludge treatment
Inventors:
Yasuhito Inagaki, Haruo Watanabe, Shigeo Kiuchi, Takaaki Kano
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Jan 7, 2000
Inventors
Yasuhito Inagaki
Haruo Watanabe
Shigeo Kiuchi
Takaaki Kano
Assignees (at issue)
SONY GROUP CORPORATION
LION GROUP, INC.
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.