Patents by Inventor Seija Helena Aalto

Seija Helena Aalto 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).

  • Controlled release fertilizer compositions and processes for the preparation thereof
    Patent number: 5993505
    Abstract: A controlled release fertiliser composition is provided having a fertiliser compound in a granular core with a coating applied on the core material. The fertiliser composition is structured to enable a cumulative release of fertiliser compound of less than 10% of the total weight of the fertiliser compound in the granular core within 30 days after exposure of the fertiliser composition to moisture and the coating consists of a single layer of a uniform, substantially continuous polymer film which is present on at least 90% of the granular core material A process is also provided for producing the fertiliser composition.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: November 30, 1999
    Assignee: OMS Investments, Inc.
    Inventors: Edze Jan Tijsma, Johannes Gijsbertus Antonius Terlingen, Seija Helena Aalto, Hendrikus Gijsbertus Adrianus van Kaathoven