Granted Patent
Utility
US 6,749,679 · App. 10/055,554
Composition of materials for production of acid resistant cement and concrete and methods thereof
Inventor:
Caijun Shi
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Jan 23, 2002
Inventor
Caijun Shi
Assignee (at issue)
ADVANCED MATERIAL TECHNOLOGIES, 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.