Granted Patent
Utility
US 5,679,254 · App. 08/560,745
Desalination of seawater by nonionic surfactant aided phase separation
Inventor:
Debtosh Chakrabarti
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Nov 20, 1995
Inventor
Debtosh Chakrabarti
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.