Granted Patent
Utility
US 5,919,975 · App. 08/655,992
Aromatic and aliphatic sulfonates and properties and applications thereof
Inventor:
Khalid Rasheed
Patented Case
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Granted: Jul 6, 1999
Filed: May 31, 1996
Inventor
Khalid Rasheed
Assignee (at issue)
Witco 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.