Granted Patent
Utility
US 5,164,120 · App. 07/788,843
Surfactant mixtures
Inventors:
James E. Borland, Terry Crutcher, Jeffrey W. Perine, Joe D. Sauer, Kim R. Smith
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Nov 7, 1991
Inventors
James E. Borland
Terry Crutcher
Jeffrey W. Perine
Joe D. Sauer
Kim R. Smith
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.