Patents by Inventor Mark Gerard Kramer

Mark Gerard Kramer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Stabilization of heavy metals in ash
    Patent number: 5649895
    Abstract: This invention relates to a process for stabilizing heavy metals in ash. The steps of the process include: (a) preparing an aqueous slurry of ash and water; (b) decreasing the pH of the aqueous slurry to less than about 5.0 in the presence of an iron salt; (c) treating the aqueous slurry with (1) an organo sulfur containing compound, (2) an alkaline extract of peat moss, and (3) an alkaline earth metal containing compound. Heavy metals in ash treated by this process will not leach into the environment.
    Type: Grant
    Filed: February 14, 1996
    Date of Patent: July 22, 1997
    Assignee: Ashland Inc.
    Inventors: Kathleen Ann Fix, Mark Gerard Kramer