Granted Patent
Utility
US 5,458,264 · App. 08/249,473
Device for emptying powdery substances from containers
Inventors:
Roland Schaffer, Herbert Riemenschneider
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: May 26, 1994
Inventors
Roland Schaffer
Herbert Riemenschneider
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.