Granted Patent
Utility
US 5,401,323 · App. 08/118,078
Method for removing clay deposits from cooling water systems
Inventors:
Donald T. Freese, Raymond Post, Edmund J. Bockowski
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Sep 8, 1993
Inventors
Donald T. Freese
Raymond Post
Edmund J. Bockowski
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.