Granted Patent
Utility
US 5,977,189 · App. 08/900,256
C.sub.7 -C.sub.12 diol and diol alkoxylates as coupling agents for surfactant formulations
Inventor:
Robert O. Keys
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Jul 25, 1997
Inventor
Robert O. Keys
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.