Granted Patent
Utility
US 4,913,823 · App. 07/258,034
Process for dissolving and removing scale from aqueous systems
Inventors:
Richard J. Lipinski, Kelvin Y. Chang
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Oct 14, 1988
Inventors
Richard J. Lipinski
Kelvin Y. Chang
Assignee (at issue)
The Mogul Corporation
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.