Granted Patent
Utility
US 4,209,397 · App. 06/007,948
Flocculants for aqueous systems
Inventors:
Harold A. Green, John J. Merianos, Alfonso N. Petrocci, Morris Weinstein
Patented Case
View Patent ↗
Granted: Jun 24, 1980
Filed: Jan 31, 1979
Inventors
Harold A. Green
John J. Merianos
Alfonso N. Petrocci
Morris Weinstein
Assignee (at issue)
Kewanee Industries, 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.