Patents by Inventor Harold Jan Smelt

Harold Jan Smelt 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).

  • Process for producing high molecular weight polyethylene
    Patent number: 10118998
    Abstract: Processes for producing an (ultra) high molecular weight polyethylene (HMWPE) article include incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-linking the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: November 6, 2018
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin Van Duin
  • PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE
    Publication number: 20170107336
    Abstract: Processes for producing an (ultra) high molecular weight polyethylene (HMWPE) article include incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-linking the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Application
    Filed: December 28, 2016
    Publication date: April 20, 2017
    Inventors: Harold Jan SMELT, Pieter GIJSMAN, Martin VAN DUIN
  • Process for producing high molecular weight polyethylene
    Patent number: 9555160
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising: incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: January 31, 2017
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin Van Duin
  • PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE
    Publication number: 20160184476
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising: incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Application
    Filed: February 19, 2016
    Publication date: June 30, 2016
    Inventors: Harold Jan SMELT, Pieter GIJSMAN, Martin VAN DUIN
  • Process for producing high molecular weight polyethylene
    Patent number: 9290629
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising: incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: March 22, 2016
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin Van Duin
  • Process for producing high molecular weight polyethylene
    Patent number: 9238719
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising:—incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and—cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: January 19, 2016
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin van Duin
  • PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE
    Publication number: 20150203641
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising: incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Application
    Filed: March 27, 2015
    Publication date: July 23, 2015
    Inventors: Harold Jan SMELT, Pieter GIJSMAN, Martin VAN DUIN
  • PROCESS FOR THE PRODUCTION OF AN UHMWPE ARTICLE
    Publication number: 20130203886
    Abstract: The invention relates to a process for the production of an article, wherein—ethylene is polymerized with a polyene and optionally another comonomer, resulting in a polymer with a MFI (21.6) between 0.05 dg/min and 100 dg/min,—melt processing the polymer into an article,—optionally crosslinking the polymer during or after melt processing the polymer and—optionally sterilizing the polymer article by high energy irradiation.
    Type: Application
    Filed: March 4, 2011
    Publication date: August 8, 2013
    Inventors: Nileshkumar Prakash Kukalyekar, Jan Stolk, Mitcha Sandor Nicolaas Mulders, Robert Hendrik Catharina Janssen, Harold Jan Smelt, Piotr Pawel Matloka
  • PROCESS FOR PRODUCING (ULTRA) HIGH MOLECULAR WEIGHT POLYETHYLENE
    Publication number: 20110040381
    Abstract: The invention relates to a process for the production of an ultra-high molecular weight polyethylene ((U)HMWPE) article comprising: —copolymerizing ethylene with a linear, branched or cyclic polyene having 3 to 100 carbon atoms, resulting in a copolymer of ethylene and polyene ((U)HMWPE-P), using such a content of polyene that the number of polyene branches in (U)HMWPE-P is 0.01 to 15 on the average per 1000 carbon atoms; —cross-link the (U)HMWPE-P during or after molding the (U)HMWPE-P.
    Type: Application
    Filed: November 6, 2008
    Publication date: February 17, 2011
    Inventors: Timothy James Kidd, Robert Hendrik Catharina Janssen, Filip Frederix, Jan Stolk, Harold Jan Smelt
  • PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE
    Publication number: 20100331995
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising:—incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and—cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Application
    Filed: November 6, 2008
    Publication date: December 30, 2010
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin van Duin