Granted Patent
Utility
US 5,394,932 · App. 07/831,528
Multiple part cores for investment casting
Inventors:
Eugene J. Carozza, Gregory R. Frank, Charles F. Caccavale, Ronald R. Robb
Patented Case
View Patent ↗
Granted: Mar 7, 1995
Filed: Feb 5, 1992
Inventors
Eugene J. Carozza
Gregory R. Frank
Charles F. Caccavale
Ronald R. Robb
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.