Granted Patent
Utility
US 5,668,084 · App. 08/509,908
Polyhexamethylene biguanide and surfactant composition and method for preventing waterline residue
Inventors:
Michael J. Unhoch, George D. Stratton
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Aug 1, 1995
Inventors
Michael J. Unhoch
George D. Stratton
Assignee (at issue)
Zeneca Limited
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.