Patents by Inventor Albrecht Husmann

Albrecht Husmann 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).

  • Method for the production of fillers and flame retardants based on gibbsite and application in plastics
    Patent number: 5100641
    Abstract: A process is disclosed for producing aluminum hydroxide in the form of gibbsite in particular shapes, suitable for use as a filler, flame retardant and/or fibrous reinforcement. The process includes the steps of crystallizing gibbsite from a Bayer process sodium aluminate liquor, in the presence of an additive comprising either a hydroxycarboxilic acid for producing needle shaped, rod-like hydrargillite or in the presence of a polyalcohol, fatty acid or lithium compound for producing platy or tabular gibbsite.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: March 31, 1992
    Assignee: Vereinigte Aluminium-Werke Aktiengesellschaft
    Inventors: Hubertus Schmidt, Albrecht Husmann