Granted Patent
Utility
US 6,083,328 · App. 08/239,439
Casting rolls made of hardenable copper alloy
Inventors:
Horst Gravemann, Thomas Helmenkamp
Patented Case
View Patent ↗
Granted: Jul 4, 2000
Filed: May 6, 1994
Inventors
Horst Gravemann
Thomas Helmenkamp
Assignee (at issue)
KM Europa Metal Aktiengesellschaft
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.