Granted Patent
Utility
US 5,230,754 · App. 07/664,309
Aluminum master alloys containing strontium, boron, and silicon for grain refining and modifying aluminum alloys
Inventors:
William C. Setzer, David K. Young, Bryan T. Dunville, Frank P. Koch, Richard J. Malliris
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Mar 4, 1991
Inventors
William C. Setzer
David K. Young
Bryan T. Dunville
Frank P. Koch
Richard J. Malliris
Assignee (at issue)
KB Alloys
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.