Patents by Inventor Jacobus M. van Keulen

Jacobus M. van Keulen 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).

  • Liquid absorbing fibrous material treated with a wood preservative agent
    Patent number: 4389446
    Abstract: A method for the treatment of wood by a wood preserving agent in a liquid or paste-like form, to be positioned (inserted) in a recess in the wood, which recess is subsequently sealed off.The wood preserving agent contains a water-expelling agent, a water-repellent agent and a biocide.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: June 21, 1983
    Assignee: Woodcap, B.V.
    Inventors: Cornelis W. Blom, Jacobus M. van Keulen
  • Method for the treatment of wood by a wood preserving agent, as well as wood treated with such a wood preservative agent
    Patent number: 4265958
    Abstract: A method for the treatment of wood by a wood preserving agent in a liquid or paste-like form, to be positioned (inserted) in a recess in the wood, which recess is subsequently sealed off.The wood preserving agent contains a water-expelling agent, a water-repellent agent and a biocide.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: May 5, 1981
    Assignee: Hoeka Sierpleisters En Muurverven B.V.
    Inventors: Cornelis W. Blom, Jacobus M. van Keulen