Patents by Inventor Koert Liekelema

Koert Liekelema 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).

  • Crystalline melamine and its use in amino-formaldehyde resins
    Patent number: 6706856
    Abstract: Multicrystalline melamine powder having a specific area of from 0.7-5 m2/g, content of oxygen-containing components of less than 0.7 wt %, an APHA colour less than 17 and a melam content higher than 1.5 wt %. The multicrystalline melamine powder may be used in amino-formaldehyde resins.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: March 16, 2004
    Assignee: DSM N.V.
    Inventors: Veronika M. L. J. Aarts, Tjay T. Tjioe, Koert Liekelema
  • Crystalline melamine and its use in amino-formaldehyde resins
    Publication number: 20030018158
    Abstract: The invention relates to multicrystalline melamine powder having the following properties:
    Type: Application
    Filed: May 2, 2002
    Publication date: January 23, 2003
    Inventors: Veronika M.L.J. Aarts, Tjay T. Tjioe, Koert Liekelema