Granted Patent
Utility
US 5,326,478 · App. 08/099,674
Methods for controlling scale formation in aqueous systems
Inventors:
Libardo A. Perez, Donald T. Freese, Judith B. Rockett, William S. Carey
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Jul 29, 1993
Inventors
Libardo A. Perez
Donald T. Freese
Judith B. Rockett
William S. Carey
Assignee (at issue)
Betz Laboratories, 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.