Patents Assigned to Swift Chemical Company
  • Slow acting fertilizer
    Patent number: 4019889
    Abstract: Fertilizer compositions which are slowly and uniformly leached and made available to the plant over a relatively long period of time resulting in more efficient utilization of the fertilizer by the plant are provided by bonding fertilizer material with the hemihydrate of calcium sulfate.
    Type: Grant
    Filed: July 21, 1975
    Date of Patent: April 26, 1977
    Assignee: Swift Chemical Company
    Inventor: Joseph P. Kealy