Granted Patent
Utility
US 5,007,991 · App. 07/533,321
Organoaluminum electrolytes for the electrolytic deposition of high-purity aluminum
Inventors:
Herbert Lehmkuhl, Klaus-Dieter Mehler
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Jun 5, 1990
Inventors
Herbert Lehmkuhl
Klaus-Dieter Mehler
Assignee (at issue)
Studiengesellschaft Kohle gGmbH
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.