Granted Patent
Utility
US 6,490,793 · App. 09/556,323
Method of manufacture of as-cast composite roll
Inventors:
Carl-Johan Maderud, Jan-Erik Karlsson
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Apr 24, 2000
Inventors
Carl-Johan Maderud
Jan-Erik Karlsson
Assignee (at issue)
SANDVIK AB
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.