Granted Patent
Utility
US 4,968,734 · App. 07/087,380
Cement admixture
Inventors:
James M. Gaidis, Joseph M. Daly
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Aug 20, 1987
Inventors
James M. Gaidis
Joseph M. Daly
Assignee (at issue)
W.R. Grace & Co. Conn.
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.