Granted Patent
Utility
US 5,534,149 · App. 08/406,519
Method of separating catalyst-free working solution from the hydrogenation cycle of the anthraquinone method for the production of hydrogen peroxide
Inventors:
Hans Birkenbeil, Ulrich Brand, Gustaaf Goor, Wolfgang Kunkel
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Mar 20, 1995
Inventors
Hans Birkenbeil
Ulrich Brand
Gustaaf Goor
Wolfgang Kunkel
Assignee (at issue)
Degussa AG
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.