Patents by Inventor Christiaan Nap

Christiaan Nap 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).

  • Hydrolytic process for the preparation of a melt stable polycaprolactam
    Patent number: 4746724
    Abstract: The invention relates to a process for the preparation of a caprolactam that is not appreciably subject to re-equilibration during melt spinning of textile fibres. In the process such an amount of chain length regulating agent is used that the relative viscosity of the polyamide increases by not more than 0.5 units after 20 hour heat treatment in the solid phase in an inert gas atmosphere at between 110.degree. C. and 190.degree. C., after extraction.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: May 24, 1988
    Assignee: Stamicarbon, B.V.
    Inventors: Christiaan Nap, Robert Kirschbaum, Pierre J. Franssen