Patents by Inventor Roy E. Grubbs

Roy E. Grubbs 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 and apparatus for dehydrating toxic chemical sludge
    Patent number: 4734998
    Abstract: A method and apparatus for same are provided to dehydrate a toxic chemical waste sludge to a powder by an internal heat source and to deposit said powder into a container, said apparatus receiving said sludge from a holding tank hopper having means for wiping said sludge into an auger, said auger serving to feed sludge to said apparatus, and said apparatus having an internal auger to move said dry powder to a storage container.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: April 5, 1988
    Assignees: Jimmy Wells Needham, Joseph Needham, Jack Newton Needham
    Inventors: William F. Lee, Roy E. Grubbs