Patents by Inventor Ralf Stefan Knischka

Ralf Stefan Knischka 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).

  • Patent number: 8268202
    Abstract: Disclosed are potassium cesium tungsten bronze solid solution particles of the formula KxCsyWOz, where x+y?1 and 2?z?3. The particles are for instance micron or nano scaled particles. Also disclosed are organic or inorganic compositions comprising an organic or inorganic substrate and incorporated therein the present potassium cesium tungsten bronze solid solution particles. The substrates are for instance plastics, coatings, inks, adhesives, ceramics or glass. Also disclosed is a method for the preparation of the present potassium cesium tungsten bronze solid solution particles, which method comprises mixing a suitable tungsten source with a salt of potassium and a salt of cesium to form a powder mixture and exposing the powder mixture to a plasma torch under a reducing atmosphere. The present tungsten bronze particles are suitable NIR absorbers and heat shielding additives.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: September 18, 2012
    Assignee: BASF SE
    Inventors: Marc Andrew Mamak, Urs Lehmann, Urs Leo Stadler, Ralf Stefan Knischka
  • Publication number: 20110248225
    Abstract: Disclosed are potassium cesium tungsten bronze solid solution particles of the formula KxCsyWOz, where x+y?1 and 2?z?3. The particles are for instance micron or nano scaled particles. Also disclosed are organic or inorganic compositions comprising an organic or inorganic substrate and incorporated therein the present potassium cesium tungsten bronze solid solution particles. The substrates are for instance plastics, coatings, inks, adhesives, ceramics or glass. Also disclosed is a method for the preparation of the present potassium cesium tungsten bronze solid solution particles, which method comprises mixing a suitable tungsten source with a salt of potassium and a salt of cesium to form a powder mixture and exposing the powder mixture to a plasma torch under a reducing atmosphere. The present tungsten bronze particles are suitable NIR absorbers and heat shielding additives.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 13, 2011
    Applicant: BASF SE
    Inventors: Marc Andrew Mamak, Urs Lehmann, Urs Leo Stadler, Ralf Stefan Knischka