Granted Patent
Utility
US 6,447,597 · App. 09/497,528
Hydrated calcium aluminate based expansive admixture
Inventors:
Wellington L. Repette, Noel P. Mailvaganam
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Feb 4, 2000
Inventors
Wellington L. Repette
Noel P. Mailvaganam
Assignee (at issue)
National Research Council
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.