Patents by Inventor Ralph Lehnen

Ralph Lehnen 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).

  • MULTIFUNCTIONAL CYCLIC ORGANIC CARBONATES AS CURING AGENTS FOR ORGANIC COMPOUNDS HAVING PHENOLIC HYDROXYL GROUPS
    Publication number: 20220289907
    Abstract: The invention relates to a curable mixture comprising at least one organic compound having phenolic hydroxyl groups and at least one multifunctional cyclic organic carbonate as crosslinking agent, to a method of curing the said organic compound having phenolic hydroxyl groups with at least one multifunctional cyclic organic carbonate, and to binders for coating compositions, adhesive compositions, or filler compositions comprising at least one organic compound having phenolic hydroxyl groups and at least one multifunctional cyclic organic carbonate.
    Type: Application
    Filed: August 17, 2020
    Publication date: September 15, 2022
    Inventors: Nick BORNHOLDT, Ralph LEHNEN, Klaus DÜCK, Elke FLIEDNER
  • Fiberplates made of polyamines or polyamine-containing aminoplast resins as binding agents
    Patent number: 6624284
    Abstract: A process for producing fiberboard panels includes I. gluing cellulosic fibers with an aqueous glue solution and adjusting the moisture content of the cellulosic fibers and/or the water content of the glue such that the moisture content of the glued cellulosic fibers is not more than 150%; and II. compressing the glued cellulosic fibers produced in step (I) at elevated temperature to fiberboard panels.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: September 23, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Biedermann, Stephan Weinkötz, Günter Scherr, Franz Wolf, Gunter Lehmann, Ralph Lehnen