Patents by Inventor William J. Prindle

William J. Prindle 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).

  • Stable blocks formed of shredded paper-like material
    Patent number: 4148952
    Abstract: A stable block is formed of shredded paper or paper-like material (herein after referred to as "paper") and a binder such as ligninsulfonate. The block is formed by shredding paper, mixing the shreds with a binder such as ligninsulfonate resin, and placing the same in a heated matrix of a die; and while in the die, subjecting the mixture to high pressure.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: April 10, 1979
    Assignee: Papakube Corp.
    Inventors: Gerald B. Nelson, William J. Prindle