Patents Assigned to D. M. Scott & Sons Company
  • 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