Granted Patent
Utility
US 4,597,956 · App. 06/707,804
Treatment process for removing fluoride impurities from aluminosilicates
Inventors:
Richard J. Hinchey, Alexander J. Caglione
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Mar 4, 1985
Inventors
Richard J. Hinchey
Alexander J. Caglione
Assignee (at issue)
Union Carbide Corporation
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.