Patents by Inventor Joseph T. Elder

Joseph T. Elder 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 preserving protein in animal droppings
    Patent number: 4242809
    Abstract: A method and apparatus for collecting and drying animal droppings at room temperature to substantially prevent the decomposition of the protein and urea therein. The droppings are collected on boards positioned beneath cages for the animals, and air at ambient temperature is forced over the droppings. The dried droppings are periodically turned and removed by raking apparatus which moves over the boards and either forces the droppings down tubular means to a conveyor below or sucks the droppings from the boards with vacuum.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: January 6, 1981
    Inventor: Joseph T. Elder