Granted Patent
Utility
US 5,754,423 · App. 08/643,741
Method and apparatus for preparing a mixture of materials
Inventors:
Josef Teutenberg, Werner Brosowski
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: May 6, 1996
Inventors
Josef Teutenberg
Werner Brosowski
Assignee (at issue)
Krupp Polysius 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.