Granted Patent
Utility
US 6,488,477 · App. 09/674,548
Material feed container, especially for thick material pumps
Inventor:
Hellmut Hurr
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Nov 1, 2000
Inventor
Hellmut Hurr
Assignee (at issue)
PUTZMEISTER INC.
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.