Granted Patent
Utility
US 5,843,317 · App. 08/806,349
Recovery and reuse of anionic surfactants from aqueous solutions
Inventors:
Manilal S. Dahanayake, Mark Ventura, Alwyn Nartey
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Feb 26, 1997
Inventors
Manilal S. Dahanayake
Mark Ventura
Alwyn Nartey
Assignee (at issue)
Rhodia, Inc.
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.