Granted Patent
Utility
US 6,007,639 · App. 09/066,632
Blasting process for removing contaminants from substrates and potassium magnesium sulfate-containing blast media
Inventor:
Andrew Logan
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Apr 24, 1998
Inventor
Andrew Logan
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.