Granted Patent
Utility
US 5,032,625 · App. 07/579,836
Polishable, flame retarded, synthetic mineral product and method
Inventors:
Gilbert B. Ross, Lonnie F. Risley
Patented Case
View Patent ↗
Granted: Jul 16, 1991
Filed: Sep 10, 1990
Inventors
Gilbert B. Ross
Lonnie F. Risley
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.