Granted Patent
Utility
US 5,279,353 · App. 07/893,464
Method and apparatus to effect a fine grain size in continuous cast metals
Inventors:
William D. Nielsen, Thomas D. Nielsen
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Jun 4, 1992
Inventors
William D. Nielsen
Thomas D. Nielsen
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.