Patents by Inventor Bert-Jan Kamphuis

Bert-Jan Kamphuis 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).

  • Cobalt bearing polymeric compositions
    Patent number: 8425997
    Abstract: The invention relates to polymeric cobalt bearing compounds, in particular for use as metal-rubber adhesion promoters (RAPs) in tires, belts and hoses. Known active substances are a.o. cobalt stearates, naphthenates, resinates, decanoates, boro-decanoates and many other forms of acylates. While these substances appear to enhance the metal-rubber adhesion, all of them also come with significant drawbacks, a.o. linked to the relatively high bioavailability of cobalt in these substances. The invention concerns more particularly a polymer comprising Co-carboxylate sequences, with a Co content of at least 3% by weight, and with a mean molecular weight of more than 2000. Several synthesis methods, allowing to reach relatively high Co concentrations in the polymer, illustrate the invention. The invented polymers show a strongly reduced bioavailability of Co compared to currently available products, as demonstrated by aqueous leaching tests.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: April 23, 2013
    Assignee: Umicore
    Inventors: Eddy Clauwaert, Bert-Jan Kamphuis
  • Cobalt Bearing Polymeric Compositions
    Publication number: 20110206879
    Abstract: The invention relates to polymeric cobalt bearing compounds, in particular for use as metal-rubber adhesion promoters (RAPs) in tires, belts and hoses. Known active substances are a.o. cobalt stearates, naphthenates, resinates, decanoates, boro-decanoates and many other forms of acylates. While these substances appear to enhance the metal-rubber adhesion, all of them also come with significant drawbacks, a.o. linked to the relatively high bioavailability of cobalt in these substances. The invention concerns more particularly a polymer comprising Co-carboxylate sequences, with a Co content of at least 3% by weight, and with a mean molecular weight of more than 2000. Several synthesis methods, allowing to reach relatively high Co concentrations in the polymer, illustrate the invention. The invented polymers show a strongly reduced bioavailability of Co compared to currently available products, as demonstrated by aqueous leaching tests.
    Type: Application
    Filed: September 14, 2009
    Publication date: August 25, 2011
    Applicant: UMICORE
    Inventors: Eddy Clauwaert, Bert-Jan Kamphuis
  • Pre-alloyed bond powders
    Patent number: 7077883
    Abstract: The present invention relates to a pre-alloyed powder and its use as a bond powder in the manufacture of powder metallurgy parts and of diamond tools in particular. A pre-alloyed powder is disclosed, based on the iron-copper dual phase system, additionally containing Co, Ni, Mo, W, oxides or carbides as reinforcing elements in the iron phase, and Sn in the copper phase.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: July 18, 2006
    Assignee: Umicore
    Inventors: Bert-Jan Kamphuis, Janneck Peersman
  • Pre-alloyed bond powders
    Publication number: 20050106057
    Abstract: The present invention relates to a pre-alloyed powder and its use as a bond powder in the manufacture of powder metallurgy parts and of diamond tools in particular. A pre-alloyed powder is disclosed, based on the iron-copper dual phase system, additionally containing Co, Ni, Mo, W, oxides or carbides as reinforcing elements in the iron phase, and Sn in the copper phase.
    Type: Application
    Filed: September 28, 2004
    Publication date: May 19, 2005
    Inventors: Bert-Jan Kamphuis, Janneck Peersman