Granted Patent
Utility
US 5,853,476 · App. 08/909,156
Process for coloring concrete using compacted inorganic granules
Inventor:
James Will
Patented Case
View Patent ↗
Granted: Dec 29, 1998
Filed: Aug 11, 1997
Inventor
James Will
Assignee (at issue)
Elementis Pigments, Inc.
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.