Granted Patent
Utility
US 6,069,113 · App. 09/152,182
Formulated copper algaecides
Inventors:
David J. Kierzkowski, John Puetz, Gang Wei
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Sep 14, 1998
Inventors
David J. Kierzkowski
John Puetz
Gang Wei
Assignee (at issue)
Laporte Water Technologies & Biochem, 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.