Granted Patent
Utility
US 6,231,665 · App. 09/401,640
Efflorescence control in cementitious compositions and masonry units
Inventors:
Awdhoot Vasant Kerkar, Vikram Kumar
Patented Case
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Granted: May 15, 2001
Filed: Sep 22, 1999
Inventors
Awdhoot Vasant Kerkar
Vikram Kumar
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.