Granted Patent
Utility
US 4,589,988 · App. 06/729,650
Softener-containing washing agent
Inventors:
Hans-Peter Rieck, Hans-Jurgen Kalz, Adolf May, Jochen M. Quack, Hans-Walter Bucking
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: May 2, 1985
Inventors
Hans-Peter Rieck
Hans-Jurgen Kalz
Adolf May
Jochen M. Quack
Hans-Walter Bucking
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.