Granted Patent
Utility
US 5,308,403 · App. 08/006,648
Blast media containing magnesium oxide
Inventors:
Benny S. Yam, Anthony E. Winston
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Jan 21, 1993
Inventors
Benny S. Yam
Anthony E. Winston
Assignee (at issue)
Church & Dwight Co., 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.