Granted Patent
Utility
US 4,458,741 · App. 05/874,849
Method of aspiration casting
Inventors:
Sankar P. Iyer, Roy D. Lewis, H. Joseph Klein, William C. Hord, James C. Ailor
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Feb 3, 1978
Inventors
Sankar P. Iyer
Roy D. Lewis
H. Joseph Klein
William C. Hord
James C. Ailor
Assignee (at issue)
Cabot 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.