Granted Patent
Utility
US 4,412,863 · App. 06/299,359
Inorganic cement compositions having controlled thermal expansion coefficients
Inventor:
James E. Neely, Jr.
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Sep 4, 1981
Inventor
James E. Neely, Jr.
Assignee (at issue)
PPG Industries, 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.