Patents by Inventor Hannu Aijala

Hannu Aijala 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).

  • Aqueous fertilzer suspension containing at least phosphate ions and calcium or magnesium ions and a use of the suspension
    Patent number: 5997602
    Abstract: The invention relates to a stable, concentrated aqueous fertilizer suspension, which can be diluted with water to provide a working solution. The suspension contains 10 to 60% by weight of water and 40 to 90% by weight of a plant nutrient composition based on at least a calcium, and/or a magnesium and a phosphate ion, and the suspension comprises at least one plant nutrient containing water-insoluble solid particles with a particle size less than 50 .mu.m, the pH of the suspension being in the range of 0.5 to less than 2.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: December 7, 1999
    Assignee: Kemira Agro Oy
    Inventor: Hannu Aijala
  • Suspension fertilizer suitable for irrigation fertilization, and a process for its preparation
    Patent number: 5851260
    Abstract: The invention relates to a stable aqueous fertilizer suspension suitable for drip irrigation, which suspension contains 5-55% by weight water and 45-95% by weight of one or several plant-nutrient containing substances, of which at least one contains water-insoluble solid particles, the particle size of the solid particles contained in the suspension being less than 50 .mu.m and the pH of the suspension being within the range 2-7. The invention also relates to a process for the preparation of this suspension.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: December 22, 1998
    Assignee: Kemira Agro Oy
    Inventors: Hannu Aijala, Thomas Ahlnas