Granted Patent
Utility
US 5,601,643 · App. 08/649,413
Fly ash cementitious material and method of making a product
Inventors:
Thomas Silverstrim, Hossein Rostami, Jesus Larralde, Anamolah Samadi
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: May 16, 1996
Inventors
Thomas Silverstrim
Hossein Rostami
Jesus Larralde
Anamolah Samadi
Assignees (at issue)
DREXEL UNIVERSITY
By-Products Development Co.
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.