Patents by Inventor Leonard Nielaba

Leonard Nielaba 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: 20240125018
    Abstract: Articles such as a net, a round sling or a splice include a resin-impregnated lengthy body having multifilamentary yarns comprised of high performance polyethylene (HPPE) fibres and a polymeric resin dispersed throughout a cross-section of the multifilamentary yarns. The the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene, wherein the polymeric resin has a density as measured according to ISO1183 in the range from 860 to 930 kg/m3, a melting temperature in the range from 40 to 140° C. and a heat of fusion of at least 5 J/g.
    Type: Application
    Filed: December 15, 2023
    Publication date: April 18, 2024
    Inventors: Roelof MARISSEN, Hans SCHNEIDERS, Rigobert BOSMAN, Dietrich WIENKE, Leonard NIELABA
  • Publication number: 20220041819
    Abstract: The invention relates to a method for manufacturing a composite sheet comprising high performance polyethylene fibres and a polymeric resin comprising the steps of assembling HPPE fibres to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to composite sheets obtainable by said method and articles comprising the composite sheet such as helmets, radomes or a tarpaulins.
    Type: Application
    Filed: September 21, 2021
    Publication date: February 10, 2022
    Inventors: Roelof MARISSEN, Johannes WILMS, Leonard NIELABA
  • Patent number: 11149122
    Abstract: The invention relates to a method for manufacturing a composite sheet comprising high performance polyethylene fibres and a polymeric resin comprising the steps of assembling HPPE fibres to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to composite sheets obtainable by said method and articles comprising the composite sheet such as helmets, radomes or a tarpaulins.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: October 19, 2021
    Assignee: DSM IP ASSETS B.V.
    Inventors: Roelof Marissen, Johannes Wilms, Leonard Nielaba
  • Publication number: 20210102313
    Abstract: The present invention relates to hybrid sheet comprising: i) high-performance polyethylene (HPPE) fibers; ii) a polymeric resin, wherein the polymeric resin is selected from a group consisting of a homopolymer of ethylene, a homopolymer of propylene, a copolymer of ethylene, and a copolymer of propylene and wherein said polymeric resin has a density as measured according to ISO1183-2004 in the range from 860 to 970 kg/m3, a peak melting temperature in the range from 40 to 140° C. and a heat of fusion of at least 5 J/g; iii) non-polymeric fibers; and iv) optionally, a matrix material. Furthermore, the present invention relates to a process to manufacture the hybrid sheet and to the use of the hybrid sheet in various fields, such as in automotive field, in aerospace field, in sports equipment, in marine field, in military field; and in wind and renewable energy field.
    Type: Application
    Filed: April 3, 2018
    Publication date: April 8, 2021
    Inventors: Roelof MARISSEN, Robert COHNEN, Johannes Petrus Marinus PLUG, Leonard NIELABA
  • Publication number: 20190040556
    Abstract: The invention relates to a method for manufacturing a lengthy body comprising high performance polyethylene fibres and a polymeric resin comprising the steps of applying an aqueous suspension of a polymeric resin to HPPE fibres, assembling the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature, tension and/or a pressure treatment to the lengthy body wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to lengthy bodies obtainable by said method and articles comprising the lengthy body such nets, round slings, splices, belts or synthetic chain links.
    Type: Application
    Filed: October 7, 2016
    Publication date: February 7, 2019
    Applicant: DSM IP Assets B.V.
    Inventors: Roelof MARISSEN, Hans SCHNEIDERS, Rigobert BOSMAN, Dietrich WIENKE, Leonard NIELABA
  • Publication number: 20180282497
    Abstract: The invention relates to a method for manufacturing a composite sheet comprising high performance polyethylene fibres and a polymeric resin comprising the steps of assembling HPPE fibres to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to composite sheets obtainable by said method and articles comprising the composite sheet such as helmets, radomes or a tarpaulins.
    Type: Application
    Filed: October 7, 2016
    Publication date: October 4, 2018
    Inventors: Roelof MARISSEN, Johannes WILMS, Leonard NIELABA
  • Publication number: 20070265630
    Abstract: Fixing device, comprising a surgical cable (22) having a first and a second free end and at least three fixing plates (2, 4, 6) positioned in a stack as a top plate (6), a middle plate (4) and a bottom plate (2), leaving a gap (24, 26) between two adjacent plates, each fixing plate having a ring (14, 16, 18) surrounding a central hole (8, 10, 12), the rings having an inner edge adjacent to the hole and an outer edge along a circumference of the fixing plate, wherein the holes in the stacked position at least partly overlap each other thus forming a central hole in the stack, and wherein at least one working end of the cable follows a specified continuous trajectory containing sections running through the hole, around the outer edges and underneath, over and between the rings of the plates.
    Type: Application
    Filed: January 27, 2005
    Publication date: November 15, 2007
    Applicant: DSM IP ASSETS B.V.
    Inventors: Roelof Marissen, Leonard Nielaba, Willibrordus Theunissen
  • Publication number: 20060014459
    Abstract: The invention relates to a soft and flexible surgical soft tissue mesh comprising polyethylene yarns, wherein the polyethylene yarns have a tensile strength of more than 1.0 Gpa and consist of a polyethylene with a relative viscosity of more than 5 dl/g. A further aspect of the invention is a method of producing a soft and flexible surgical soft tissue mesh comprising polyethylene yarns, wherein yarns are applied that comprise filaments made by: a) spinning at least one filament from a solution of polyethylene with a relative viscosity of more than 5 dl/g in a solvent; b) cooling the filament obtained to form a gel filament; c) removing at least partly the solvent from the gel filament; and d) drawing the filament in at least one drawing step before, during or after removing solvent.
    Type: Application
    Filed: December 11, 2003
    Publication date: January 19, 2006
    Applicant: DSM IP Assets B.V.
    Inventors: Carina Snijder, Leonard Nielaba