Granted Patent
Utility
US 5,160,658 · App. 07/788,814
Surfactant compositions
Inventors:
Kim R. Smith, James E. Borland, Terry Crutcher, Joe D. Sauer
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Nov 7, 1991
Inventors
Kim R. Smith
James E. Borland
Terry Crutcher
Joe D. Sauer
Assignee (at issue)
Ethyl 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.