Granted Patent
Utility
US 5,670,435 · App. 08/329,091
Method and composition for clarifying waste water
Inventor:
Laura Kajita
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Oct 25, 1994
Inventor
Laura Kajita
Assignee (at issue)
AMCOL INTERNATIONAL 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.