Patents by Inventor Tobias Witt

Tobias Witt 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).

  • Process for producing a powder coating material; a powder coating material; and the use of effect pigments
    Patent number: 6547869
    Abstract: Described is a process for preparing a powder coating material, in which a mixture comprising binders, pigments and also, where appropriate, fillers, additives and cross linkers is extruded and then ground. The pigment fraction of this mixture at least in part comprises surface-modified effect pigment that has been coated with a low molecular mass polyethylene or polypropylene. Also, described is a powder coating material prepared by this process and the use of effect pigments coated with low molecular mass polyethylene or polypropylene to prepare powder coating materials.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: April 15, 2003
    Assignee: Merck Patent GmbH
    Inventor: Tobias Witt
  • Process for producing a powder coating material; a powder coating material; and the use of effect pigments
    Publication number: 20020022128
    Abstract: Described is a process for preparing a powder coating material, in which a mixture comprising binders, pigments and also, where appropriate, fillers, additives and cross linkers is extruded and then ground. The pigment fraction of this mixture at least in part comprises surface-modified effect pigment that has been coated with a low molecular mass polyethylene or polypropylene. Also, described is a powder coating material prepared by this process and the use of effect pigments coated with low molecular mass polyethylene or polypropylene to prepare powder coating materials.
    Type: Application
    Filed: July 19, 2001
    Publication date: February 21, 2002
    Applicant: Merck Patent GmbH
    Inventor: Tobias Witt