Granted Patent
Utility
US 5,312,841 · App. 07/898,974
Water based biocide
Inventor:
Donald J. Paterson
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Jun 15, 1992
Inventor
Donald J. Paterson
Assignee (at issue)
Betz PaperChem 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.