Granted Patent
Utility
US 5,592,984 · App. 08/394,006
Investment casting with improved filling
Inventors:
Dean L. Schmiedeknecht, Mark J. Straszheim, Dennis J. Thompson, Brad L. Rauguth
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Feb 23, 1995
Inventors
Dean L. Schmiedeknecht
Mark J. Straszheim
Dennis J. Thompson
Brad L. Rauguth
Assignee (at issue)
HOWMET 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.