Granted Patent
Utility
US 6,352,952 · App. 09/446,590
Admixture and method for optimizing addition of EO/PO superplasticizer to concrete containing smectite clay-containing aggregates
Inventors:
Leslie A. Jardine, Hideo Koyata, Kevin J. Folliard, Chia-Chih Ou, Felek Jachimowicz, Byong-Wa Chun, Ara A. Jeknavorian, Christon L. Hill
Patented Case
View Patent ↗
Granted: Mar 5, 2002
Filed: Dec 21, 1999
Inventors
Leslie A. Jardine
Hideo Koyata
Kevin J. Folliard
Chia-Chih Ou
Felek Jachimowicz
Byong-Wa Chun
Ara A. Jeknavorian
Christon L. Hill
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.