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).

  • Publication number: 20180375203
    Abstract: The invention relates to a radome wall comprising a multilayer sheet, the multilayer sheet comprising: a) at least one sheet layer A comprising at least two monolayers, the monolayers comprising polymeric fibers, and b) at least one first film layer B1 comprising a polyolefin, wherein the multilayer sheet has a thickness of at least 0.05 mm and at most 0.8 mm. The invention also relates to a radome comprising the radome wall, the radome preferably being a non-ballistic radome, preferably suitable for telecommunications.
    Type: Application
    Filed: December 15, 2016
    Publication date: December 27, 2018
    Applicant: DSM IP ASSETS B.V.
    Inventors: Danielle G.I. PETRA, William A.C. ROOVERS
  • 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
  • Publication number: 20100162458
    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: Application
    Filed: March 21, 2007
    Publication date: July 1, 2010
    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
  • Publication number: 20020134771
    Abstract: The invention relates to a flame-retarded polyester composition comprising 20-95 mass % aromatic polyester; 4-25 mass % bromine-containing flame-retardant compound; 1-12 mass % antimony oxide of average particle size 0.5-15 micron; and optionally polytetrafluoroethylene; glass fibers; and other additives. The composition shows a desirable combination of high strength and toughness, good melt-flow characteristics, no blooming and can be laser-marked with improved contrast. The invention also relates to a molded part for use in electrical or electronic applications, which part may be provided with a dark marking on a lighter background surface. The invention also relates to a process for applying a laser mark, as well as to an article carrying a dark laser mark on a light background surface for use in electrical or electronic applications.
    Type: Application
    Filed: January 5, 2001
    Publication date: September 26, 2002
    Inventors: Richard Wenger, Marnix Van Gurp, Eric J.H.E. Coenen, William A.C. Roovers, Esther Wessels
  • Publication number: 20020096669
    Abstract: The invention relates to a halogenfree, flame-retardant composition that comprises at least (A) an organic phosphorus compound and (B) melamine or a compound derived from melamine, or a melamine-phosphorus compound (AB) and a polymer compound comprising an olefine having 2-12 carbon atoms and 0.1-30 weight % (relative to the weight of the polymer compound) of a compound containing acid, acid anhydride or epoxy groups. The invention also relates to a polycondensate composition that contains the flame-retardant composition according to the invention.
    Type: Application
    Filed: November 27, 2001
    Publication date: July 25, 2002
    Inventors: Pieter A. Van Der Spek, Martinus L.M. Bos, William A.C. Roovers, Marnix Van Gurp, Henrica N.A.M. Menting