Granted Patent
Utility
US 5,712,233 · App. 08/589,855
Alkoxylate surfactant compositions and the use thereof in paper deinking
Inventor:
Khalid Rasheed
Patented Case
View Patent ↗
Granted: Jan 27, 1998
Filed: Jan 22, 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.