Granted Patent
Utility
US 4,424,074 · App. 06/411,033
Additives for cementitious compositions
Inventors:
Jose L. Villa, Joseph V. Sinka, Alphonso W. Marcellis, Joseph P. Fleming
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Aug 24, 1982
Inventors
Jose L. Villa
Joseph V. Sinka
Alphonso W. Marcellis
Joseph P. Fleming
Assignee (at issue)
Diamond Shamrock 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.