Granted Patent
Utility
US 5,320,757 · App. 08/042,971
Method of inhibiting calcium oxalate scale deposition
Inventors:
Davor F. Zidovec, Alexander D. Fisher
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Apr 5, 1993
Inventors
Davor F. Zidovec
Alexander D. Fisher
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.