Granted Patent
Utility
US 6,194,471 · App. 09/393,549
Fluid concentrates of modified mineral acid salts
Inventors:
Everett Crews, Peter Schilling
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Sep 10, 1999
Inventors
Everett Crews
Peter Schilling
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.