Granted Patent
Utility
US 5,167,874 · App. 07/788,815
Surfactant mixtures
Inventors:
James E. Borland, Terry Crutcher, Joe D. Sauer, Kim R. Smith
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Nov 7, 1991
Inventors
James E. Borland
Terry Crutcher
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.