Granted Patent
Utility
US 4,478,270 · App. 06/250,010
Apparatus for casting low-density alloys
Inventors:
Hyman Rosenthal, Harry Hammond
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Apr 1, 1981
Inventors
Hyman Rosenthal
Harry Hammond
Assignee (at issue)
The Interlake Companies, Inc.
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.