Granted Patent
Utility
US 4,414,034 · App. 06/399,758
Novel additive blends for cementitious materials
Inventor:
Stanley A. Lipowski
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Jul 19, 1982
Inventor
Stanley A. Lipowski
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.