Patents by Inventor Erwin Czech

Erwin Czech 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).

  • Triboelectric chargeable coating powder
    Patent number: 6242052
    Abstract: The present invention relates to triboelectrically chargeable powder coating materials to which benzimidazole-based additives are added.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: June 5, 2001
    Assignee: BASF Coatings AG
    Inventors: Christoph Hilger, Rolf Boysen, Helmut Riestenpatt, Ulrike Schlösser, Erwin Czech, Udo Mayer, Gunther-Rudolf Schröder, Benno Sens
  • Aqueous dye preparations
    Patent number: 5891227
    Abstract: Aqueous dye preparations useful for producing inks for the inkjet process or writing inks or for producing aqueous alcoholic coating or printing colors comprise, based on the weight of the preparation, from 0.1 to 15% by weight of a dye quantity comprising from 90 to 100% by weight of the dye of the formula I ##STR1## where Kat.sup..sym. is the equivalent of a metal or ammonium ion, from 1 to 40% by weight of carbon black and from 0.1 to 15% by weight of polyethylene glycol.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: April 6, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Dietrich Hoffmann, Ulrike Schlosser, Erwin Czech, Walter Kurtz, Karin Heidrun Beck, Doug R. Campbell, Helmut Bellaire, Horst Belde
  • Ballpoint pen pastes with phthalocyanine pigments
    Patent number: 5814139
    Abstract: Ballpoint pen pastes comprising at least one phthalocyanine pigment and customary ballpoint pen paste resin and organic solvent as essential components and also, if desired, further customary additives, and the preparation thereof.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: September 29, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Karin Heidrun Beck, Helmut Bellaire, Erwin Czech, Walter Kurtz
  • Finely divided blue molybdenum oxide
    Patent number: 5512264
    Abstract: An amorphous, blue molybdenum oxide having a particle size distibution of from 2 to 100 nm, and which is used advantageously in the preparation of toners for electrophotography.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: April 30, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Jorg Adel, Erwin Czech
  • Particles suitable as carriers for electrophotography
    Patent number: 5496674
    Abstract: Particles (I) which are suitable as carriers for electrophotography consist ofa) a magnetic core andb) a shell of alumina, chromium oxide, molybdenum oxide, tungsten oxide, silica, tin oxide or zirconium oxide or a mixture thereofand particles (II) consist ofa) a magnetic core andb) a shell of titanium oxideand are obtainable by decomposing a titanium tetraalcoholate in the gas phase by reaction with steam and/or oxygen in the presence of agitated cores, and these particles are used in electrophotographic two-component developers.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: March 5, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Joerg Adel, Norbert Mronga, Erwin Czech
  • Oxide-coated carriers and preparation and use thereof
    Patent number: 5039587
    Abstract: A novel carrier which is stable and effective over long cycle times (6.times.10.sup.6 prints), has an iron oxide coating of the formula (FeO).sub.x.Fe.sub.2 O.sub.3 where x=0.1-1 and is obtained by treating steel cores (or balls) with defined small amounts of sulfuric acid of defined concentration, partial oxidation of the cores thus treated and drying at 60.degree.-150.degree. C. at .ltoreq.100 mbar.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: August 13, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Erwin Czech, Werner Ostertag, Detlef Schulze-Hagenest, Franz-Ulrich Schmitt
  • Carrier for reprography and production of this carrier
    Patent number: 4925762
    Abstract: Carriers for a two-component dry developer are based on a ferrite or iron-containing core which carries a metal oxide layer consisting of reaction products deposited in the gas phase.The carriers according to the invention have abrasion-resistant metal oxide layers which permit electrostatic charging in both directions. By adjusting the thickness of the metal oxide layer, the electrical conductivity can be altered.
    Type: Grant
    Filed: August 17, 1988
    Date of Patent: May 15, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Ostertag, Erwin Czech, Franz-Ulrich Schmitt, Detlef Schulze-Hagenest
  • Electrostatic toner
    Patent number: 4912006
    Abstract: An electrostatic toner consists of a polymer a charge controlling component and an optional color-giving component, wherein the charge controlling agent component comprises one or more compounds of the formula `(I)`, ##STR1## ps where R.sup.1 is chlorine or methyl, R.sup.2 is C.sub.4 -C.sub.22 -alkyl, benzyl or 2-phenylethyl, A.THETA. is an anion, n is 0, 1 or 2, m is 1 or 2 and r is 1 or 2.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: March 27, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Breitschaft, Erwin Czech, Udo Mayer, Guenther Seybold, Horst Bruder, Rainer Dyllick-Brenzinger
  • Colored single-component toners and their preparation
    Patent number: 4803143
    Abstract: Colored single-component toners essentially consist of a magnetic pigment, a binder based on an organic polymer and/or a wax, a dye or colored pigment homogeneously distributed in the binder, and other assistants, the magnetic pigment being iron powder which has a spherical or elliptical shape.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: February 7, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Ostertag, Erwin Czech, Franz-Ulrich Schmitt, Detlef Schulze-Hagenest