Patents by Inventor Roelof Jelijs

Roelof Jelijs 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).

  • Centrifugal spinning process for spinnable solutions
    Patent number: 6159597
    Abstract: The invention pertains to a process for spinning fibers or filaments from a spinnable solution using a centrifuge of which the wall has one or more spinning orifices, in which process the spinnable solution is jetted from the centrifuge into a coagulant inside a jacket. The inner radius of the jacket is at least 35% wider than the radius of the outer circumference of the centrifuge, thus allowing the process' productive capacity to be increased. In addition, the fibers or filaments made by this process have very favorable pulp properties.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: December 12, 2000
    Assignee: AKZO Nobel NV
    Inventors: Johannes Jacobus Meerman, Roelof Jelijs