Granted Patent
Utility
US 5,254,291 · App. 07/698,551
Surfactant compositions
Inventors:
Terry Crutcher, Joe D. Sauer, Kim R. Smith, James E. Borland
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: May 10, 1991
Inventors
Terry Crutcher
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.