Granted Patent
Utility
US 5,702,613 · App. 08/235,748
Polymers containing vinylamine/vinylformamide as demulsifiers in oily wastewaters
Inventors:
Anthony G. Sommese, Ananthasubramanian Sivakumar
Patented Case
View Patent ↗
Granted: Dec 30, 1997
Filed: Apr 29, 1994
Inventors
Anthony G. Sommese
Ananthasubramanian Sivakumar
Assignee (at issue)
Nalco Chemical Company
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.