Granted Patent
Utility
US 6,511,622 · App. 09/432,935
Investment casting with improved as-cast surface finish
Inventors:
Joseph M. Vihtelic, Alan Graham, Robert L. McCormick, Laura A. Carpenter
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Nov 3, 1999
Inventors
Joseph M. Vihtelic
Alan Graham
Robert L. McCormick
Laura A. Carpenter
Assignee (at issue)
Howmet Research Corporation
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.