Patents by Inventor Friedrich Closs

Friedrich Closs 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 producing chlorocarboxylic acid chlorides
    Publication number: 20030028046
    Abstract: A process for the preparation of chlorocarboxylic chlorides of formula (I) 1
    Type: Application
    Filed: August 27, 2002
    Publication date: February 6, 2003
    Inventors: Armin Stamm, Roland Gotz, Jochem Henkelmann, Friedrich Closs, Heinz-Josef Kneuper
  • Triphenylene compounds and preparation of discotic liquid crystalline crosslinked polymers
    Patent number: 5736068
    Abstract: Novel triphenylene compounds which contain, bonded to the triphenylene framework, at least three ethylenically unsaturated groups or groups carrying oxiranyl or thiiranyl groups, and a process for the preparation of discotic liquid crystalline crosslinked polymers.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: April 7, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Lukas Haeussling, Dirk Funhoff, Karl Siemensmeyer, Karl-Heinz Etzbach, Friedrich Closs, Helmut Ringsdorf, Peter Schuhmacher
  • Ink-ribbons comprising IR-absorbing compounds
    Patent number: 5607762
    Abstract: Ink ribbons containing one or more compounds from the group comprising phthalocyanines, the naphthalocyanines, the nickel dithiolene complexes, the methine dyes and the azulene quaternary-acid dyes, all of which have their absorption maximum in the region from 700 to 1,200 nm.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: March 4, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernhard Albert, Juergen Kipper, Friedrich Closs, Helmut Bellaire
  • Laked tris- or tetracationic polymethine dyes
    Patent number: 5445672
    Abstract: In laked tris- or tetracationic polymethine dyes I ##STR1## the variables have the following meanings: A is the radical of a fused-on substituted or unsubstituted benzene or naphthalene nucleus,Y is nitrogen or phosphorus,Z is --NR.sup.1 --, --O--, --S--, --C(CH.sub.3).sub.2 -- or --CH.dbd.CH--, where R.sup.1 is a radical as defined for R,D is --CX.sup.1 .dbd., --CH.dbd.CX.sup.1 --CH.dbd., ##STR2## Het.sup.e is the equivalent of a heteropolyacid anion, m is from 1 to 10, andn is 3 or 4, where (R).sub.3, X.sup.1, and X.sup.2 have the meanings set out in the specification.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: August 29, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedrich Closs, Bernhard Albert, Henning Wienand
  • Low-molecular-weight and polymeric liquid-crystalline benzotriazoles, and the use thereof
    Patent number: 5429770
    Abstract: Low-molecular-weight and polymeric liquid-crystalline 2-substituted benzotriazoles of the formula ##STR1## are used as photoconductors or electrophotographic recording materials or as fluorescent dyes for fluorescent displays.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: July 4, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedrich Closs, Karl Siemensmeyer, Dirk Funhoff
  • Increasing photoconductivity by adjusting the discotic phase
    Patent number: 5393626
    Abstract: The present invention relates to photoconductors composed of low molecular weight or polymeric organic compounds with liquid crystal properties, where the photoconduction in the discotic phase is higher than in the non-liquid-crystal phases, and to a method for increasing the photoconductivity by molecular ordering in photoconductors.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: February 28, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedrich Closs, Thomas Frey, Dirk Funhoff, Karl Siemensmeyer, Helmut Ringsdorf, Dietrich Haarer, Peter Strohriegl
  • Use of a liquid containing IR dyes as printing ink
    Patent number: 5282894
    Abstract: A liquid useful as printing ink contains one or more dyes with their absorption maximum within the range from 700 to 1200 nm selected from the phthalocyanines, the naphthalocyanines, the nickel-dithiolene complexes, the aminium compounds of aromatic amines, the methine dyes or the azulenesquaric acid dyes, as well as solvent and binder.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: February 1, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernhard Albert, Friedrich Closs, Juergen Kipper, Walter Kurtz, Karin H. Beck, Rudolf Griebel