Patents by Inventor Rene Johannes Laenen

Rene Johannes Laenen 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).

  • Iron blue pigment composition and process for its production
    Patent number: 4113508
    Abstract: The production of iron blue pigment compositions by a flushing process has been found to be improved by carrying out the flushing step in the presence of an amine flushing agent and incorporating into the composition during or after flushing at least one surfactant of the polyoxyethylene type. The resulting iron blue compositions have improved consistency and dispersibility in printing inks, paints and the like.
    Type: Grant
    Filed: June 23, 1977
    Date of Patent: September 12, 1978
    Assignee: Hercules Incorporated
    Inventors: Johan Jozef Einerhand, Leonardus Johannes Hubertus Erkens, Rene Johannes Laenen, Joseph Wilhelmus Jacobus Hoofs