Granted Patent
Utility
US 5,242,615 · App. 07/644,470
Anionic and amphoteric surfactant compositions with reduced viscosity
Inventors:
Allen D. Urfer, Virginia Lazarowitz
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Jan 18, 1991
Inventors
Allen D. Urfer
Virginia Lazarowitz
Assignee (at issue)
Henkel Limited
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.