Granted Patent
Utility
US 5,152,403 · App. 07/663,493
Treatment of seawater evaporator aqueous systems with scale-inhibiting mixture of polymaleic anhydride and a carboxyl-containing acrylic polymer
Inventor:
Suresh G. Patel
Patented Case
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Granted: Oct 6, 1992
Filed: Mar 1, 1991
Inventor
Suresh G. Patel
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.