Patents by Inventor William A. C. Roovers

William A. C. Roovers 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).

  • Patent number: 8329084
    Abstract: The invention relates to a process for the manufacture of a shaped part comprising the steps of—forming a stack by stacking (2) or more sheets comprising mono-layers of unidirectional anti-ballistic fibers and a binder followed by placing the stack in a mould, clamping the stack in the mould with a control member closing the mould—consolidating the stack under temperature and pressure into a curved shaped part. The invention furthermore relates to products obtainable with said process, which are very suitable for use in anti-ballistic applications and include e.g. helmets, curved panels, cones and domes.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: December 11, 2012
    Assignee: DSM IP Assets B.V.
    Inventors: Jean H. M. Beugels, William A. C. Roovers, Martin A. Es,Van, Roelof Marissen, Hen Hoefnagels
  • Patent number: 6767941
    Abstract: A halogen-free, flame-retardant composition includes (1) organic phosphorus compound (A) and (1′) melamine or a compound derived from melamine (B); or (2) a melamine-phosphorus compound (AB). The composition also includes and olefin polymer and from 0.1-30 wt % based on the olefin polymer, of a compound containing acid, acid anhydride or epoxy groups. The flame-retardant composition may included in a polycondensate composition which incorporate the flame-retardant composition is substantially shortened.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: July 27, 2004
    Assignee: DSM IP Assets B.V.
    Inventors: Pieter A. Van Der Spek, Martinus L. M. Bos, William A. C. Roovers, Marnix Van Gurp, Henrica N. A. M. Menting