Granted Patent
Utility
US 4,535,640 · App. 06/547,930
Ceramic fiber molten metal sampler
Inventor:
Richard A. Falk
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Nov 2, 1983
Inventor
Richard A. Falk
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.