Patents by Inventor William M. Kirkup

William M. Kirkup 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).

  • Method for incinerating waste sludges
    Patent number: 4159684
    Abstract: Dewatered sewage sludge (i.e. sewage sludge containing e.g. 75% water when dewatered) is incinerated when mixed with coal fines recovered from a wet benification process for coal, the coal fines being in the form of either coal filter cake or ex-lagoon sludge. If the coal fines are added to the sewage sludge before or during dewatering of the latter by filtration, the coal acts as a filter aid. Autothermic combustion of the mixture can be obtained.
    Type: Grant
    Filed: November 23, 1976
    Date of Patent: July 3, 1979
    Assignee: Esmil-Envirotech, Ltd.
    Inventor: William M. Kirkup