Patents by Inventor Christopher Lee Chappell

Christopher Lee Chappell 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).

  • Detoxification
    Patent number: 4116705
    Abstract: A process which comprises treating hazardous waste with an aluminium silicate or aluminosilicate and with a Portland cement in the presence of water to form a slurry and allowing the slurry to set into rock and a crystal matrix having encapsulated therein a hazardous waste and having a permeability of less than 1 .times. 10.sup.-4 cm. sec.sup.-1 and a compressive strength 28 days after preparation of 100 to 1000 psi.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: September 26, 1978
    Assignee: Stablex AG
    Inventor: Christopher Lee Chappell