Granted Patent
Utility
US 4,852,632 · App. 07/259,503
Apparatus for preventing undissolved alloying ingredient from entering continuous casting mold
Inventors:
Charles R. Jackson, Daniel Rellis, Jr., Howard M. Pielet, Debanshu Bhattacharya, Larry A. Frank, Purnendu K. Dasgupta, John R. Knoepke
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Oct 17, 1988
Inventors
Charles R. Jackson
Daniel Rellis, Jr.
Howard M. Pielet
Debanshu Bhattacharya
Larry A. Frank
Purnendu K. Dasgupta
John R. Knoepke
Assignee (at issue)
Inland Steel Company
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.