Granted Patent
Utility
US 6,511,551 · App. 09/881,764
Method of production WC/Co cemented carbide using grain growth inhibitor
Inventors:
Byoung-Kee Kim, Gook Hyun Ha, Yong Won Woo
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Jun 18, 2001
Inventors
Byoung-Kee Kim
Gook Hyun Ha
Yong Won Woo
Assignee (at issue)
KOREA INSTITUTE OF MACHINERY & MATERIALS
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.