Granted Patent
Utility
US 5,830,842 · App. 08/638,614
Hydroxyesters as coupling agents for surfactant formulations
Inventor:
Robert O. Keys
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Apr 26, 1996
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.