Granted Patent
Utility
US 5,167,873 · App. 07/788,817
Binary surfactant mixtures
Inventors:
Terry Crutcher, Jeffrey W. Perine, Joe D. Sauer, Kim R. Smith, James E. Borland
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Nov 7, 1991
Inventors
Terry Crutcher
Jeffrey W. Perine
Joe D. Sauer
Kim R. Smith
James E. Borland
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.