Granted Patent
Utility
US 6,700,021 · App. 10/188,986
Preparation of aldehydes
Inventors:
Hans Bohnen, Carl D. Frohning, Ernst Wiebus
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Jul 3, 2002
Inventors
Hans Bohnen
Carl D. Frohning
Ernst Wiebus
Assignee (at issue)
CELANESE CHEMICALS EUROPE 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.