Granted Patent
Utility
US 6,669,790 · App. 08/857,991
Iron-based casting alloy
Inventors:
Richard B. Gundlach, Sumita Majumdar
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: May 16, 1997
Inventors
Richard B. Gundlach
Sumita Majumdar
Assignee (at issue)
Climax Research Services, 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.