Granted Patent
Utility
US 4,371,513 · App. 06/235,876
Alumina compositions
Inventors:
Moises G. Sanchez, Norman R. Laine
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Feb 19, 1981
Inventors
Moises G. Sanchez
Norman R. Laine
Assignee (at issue)
W. R. Grace & Co.
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.