Patents by Inventor Edwin L. Scheiderer

Edwin L. Scheiderer 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).

  • Coated controlled-release product
    Patent number: 4082533
    Abstract: A coated product providing for the controlled release of an active constituent, such as a fertilizer, over a long period of time comprising a core of an active constituent and two water insoluble coatings. The first coating surrounding the core contains masonry cement, and the second coating preferably contains a blend of one or more thermoplastic polymers and a wax. The coated product provides an unusually long lasting fertilizer at relatively low cost.
    Type: Grant
    Filed: June 27, 1973
    Date of Patent: April 4, 1978
    Assignee: D. M. Scott & Sons Company
    Inventors: Lawrence S. Wittenbrook, Edwin L. Scheiderer