Patents by Inventor Robert M. Coury

Robert M. Coury 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 liquid N-P-K fertilizer composition and method of use
    Patent number: 4318729
    Abstract: A liquid fertilizer composition which is storable for 6-8 months is prepared from an aqueous methylol urea containing solution and dibasic potassium phosphate. The methylol urea containing solution has a nitrogen content of approximately 15-35% by weight. The dibasic potassium phosphate adds the phosphorous and potassium components to form a complete fertilizer having a preferred N-P-K ratio of from about 6:1:1.33 to 18:1:1. It also stabilizes the methylol urea containing solution so that premature gelling and precipitation are avoided. As such, the liquid fertilizer is storable and easily applied through liquid application to a lawn.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: March 9, 1982
    Assignee: Chem-Lawn Corporation
    Inventor: Robert M. Coury