Granted Patent
Utility
US 4,803,012 · App. 07/012,102
Ethoxylated amines as solution promoters
Inventor:
Thomas Wershofen
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Feb 6, 1987
Inventor
Thomas Wershofen
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.