Granted Patent
Utility
US 5,389,280 · App. 07/821,682
Stable and homogeneous aqueous formulations of surfactants
Inventors:
Thomas Martini, Karl-Heinz Keil, Ignaz Wimmer
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Jan 16, 1992
Inventors
Thomas Martini
Karl-Heinz Keil
Ignaz Wimmer
Assignee (at issue)
Hoechst GmbH
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.