United States Patent Application: 0120024196
We've documented for you a number of times, most recently in our report of:
West Virginia Coal Association | Drexel University Formulates Coal Ash "Geopolymer" | Research & Development; concerning: "United States Patent 5,601,643 - Fly Ash Cementitious Material and Method of Making a Product; 1997; Assignees: Drexel University, Philadelphia, and By-Products Development Company, PA; Abstract: Rapid curing, high strength cementitious binder mixtures are provided containing fly ash and an alkali metal or alkaline earth metal silicate binder ... . Any of the binder, mortar and concrete mixtures can be cured under elevated temperatures to yield high strength products";