Granted Patent
Utility
US 5,866,032 · App. 08/972,530
Composition for controlling scale formation in aqueous systems
Inventors:
William S. Carey, Libardo A. Perez, Donald T. Freese, Judith L. Barron
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Nov 18, 1997
Inventors
William S. Carey
Libardo A. Perez
Donald T. Freese
Judith L. Barron
Assignee (at issue)
Betzdearborn, 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.