Granted Patent
Utility
US 5,678,583 · App. 08/445,759
Removal of ceramic shell mold material from castings
Inventors:
Patrick L. Conroy, Douglas W. Wilkinson
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: May 22, 1995
Inventors
Patrick L. Conroy
Douglas W. Wilkinson
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.