Granted Patent
Utility
US 6,409,966 · App. 09/576,813
Free machining aluminum alloy containing bismuth or bismuth-tin for free machining and a method of use
Inventor:
Subhasish Sircar
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: May 23, 2000
Inventor
Subhasish Sircar
Assignee (at issue)
Reynolds Metals Company
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.