Granted Patent
Utility
US 6,007,620 · App. 08/790,957
Process to make interground, white, blended cement
Inventors:
Timothy S. Folks, Patrick M. Hill, Frank T. Sheets, III, Richard F. Ball, Joseph R. Sisneros
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Jan 29, 1997
Inventors
Timothy S. Folks
Patrick M. Hill
Frank T. Sheets, III
Richard F. Ball
Joseph R. Sisneros
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.