Patents by Inventor Andreas Pfrengle

Andreas Pfrengle 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: 8133372
    Abstract: A method for producing ceramic components, includes providing a dispersing agent comprising at least one first and one second powder fraction of an oxide ceramic, and a third powder fraction of an inter-metallic compound mixed in a liquid. The first powder fraction comprises a nanoscale particle fraction with particle sizes ranging from about 2 nm to 200 nm and functions as a binder. The second powder fraction comprises a sintering additive. The share of the third powder fraction, relative to the sum of all powder fractions, has a volume share of between about 50% and about 95%. The method further includes forming a green body with aid of precipitation by electrophoresis from the mixture, the precipitation by electrophoresis of the powder fractions occurring simultaneously. The green body is then sintered in an oxidizing atmosphere to form a ceramic component.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: March 13, 2012
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventors: Joachim Binder, Juergen Hausselt, Andreas Pfrengle
  • Publication number: 20090301881
    Abstract: A method for producing ceramic components, includes providing a dispersing agent comprising at least one first and one second powder fraction of an oxide ceramic, and a third powder fraction of an inter-metallic compound mixed in a liquid. The first powder fraction comprises a nanoscale particle fraction with particle sizes ranging from about 2 nm to 200 nm and functions as a binder. The second powder fraction comprises a sintering additive. The share of the third powder fraction, relative to the sum of all powder fractions, has a volume share of between about 50% and about 95%. The method further includes forming a green body with aid of precipitation by electrophoresis from the mixture, the precipitation by electrophoresis of the powder fractions occurring simultaneously. The green body is then sintered in an oxidizing atmosphere to form a ceramic component.
    Type: Application
    Filed: June 8, 2009
    Publication date: December 10, 2009
    Applicant: FORSCHUNGSZENTRUM KARLSRUHE GMBH
    Inventors: Joachim Binder, Juergen Hausselt, Andreas Pfrengle
  • Patent number: 7135067
    Abstract: The invention relates to a pigment dispersion consisting essentially of a) at least one organic or inorganic pigment or a combination of the same, b) an alpha-methyl--omega-hydroxy-polyethylene glycol ether having an average molar mass of between 250 and 1000 g/mol, c) standard dispersing agents for producing aqueous pigment dispersions, d) water, and e) optionally other standard additives.
    Type: Grant
    Filed: June 29, 2002
    Date of Patent: November 14, 2006
    Assignee: Clariant GmbH
    Inventors: Andreas Harz, Lothar Wihan, Martin Alexander Winter, Andreas Pfrengle
  • Patent number: 7014699
    Abstract: The invention relates to addition compounds of formula (1): in which: n is a number from 1 to 10; R1 and R2 are identical or different and are each a hydrogen atom or a saturated or unsaturated aliphatic radical having 1 to 4 carbon atoms; R3 and R4 are identical or different and are each a hydrogen atom or alkyl having 1 to 3 carbon atoms, and the bridge member (R3+R4) is in each case positioned ortho or meta in relation to the phenolic oxygen atom; Z represents a group —CH2—CH2—, —CH2—CH(CH3)—, —CH(CH3)—CH2— or a combination thereof; s is number from 1 to 200; B represents hydrogen, —CO—CH?CH—COOM, —COCH(SO3M)CH2COOM, —CO—CH2—CH(SO3M)—COOM, —SO3M, —SO2M and/or —PO3MM, whereby M is preferably a cation selected from the group Li+, Na+, K+, NH4+, HO—CH2—CH2—NH3+, (HO—CH2—CH2—)2NH2+ or (HO—CH2—CH2—)3NH+; and Y is a radical of an amine. The inventive addition compounds are used as dispersing agents of solids, for example, pigments, particularly in aqueous media.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: March 21, 2006
    Assignee: Clariant GmbH
    Inventors: Martin Alexander Winter, Hans Joachim Metz, Andreas Harz, Andreas Pfrengle
  • Publication number: 20050075415
    Abstract: The invention relates to a pigment dispersion consisting essentially of a) at least one organic or inorganic pigment or a combination of the same, b) an alpha-methyl-omega-hydroxy-polyethylene glycol ether having an average molar mass of between 250 and 1000 g/mol, c) standard dispersing agents for producing aqueous pigment dispersions, d) water, and e) optionally other standard additives.
    Type: Application
    Filed: June 29, 2002
    Publication date: April 7, 2005
    Inventors: Andreas Harz, Lothar Wihan, Martin Winter, Andreas Pfrengle
  • Publication number: 20040116562
    Abstract: The invention relates to addition compounds of formula (1) in which: n is a number from 1 to 10; Z represents a group —CH2—CH2—, —CH2—CH(CH3)—, —CH(CH3)CH2— or a combination thereof; s is number from 1 to 200; B represents hydrogen, —CO—CH═CH—COOM, COCH(SO3M)CH2COOM, —CO—CH2—CH(SO3M)-COOM, —SO3M, —SO2M and/or —PO3MM, whereby M is preferably a cation selected from the group Li+, Na+, K+, NH4+, HO—CH2—CH2—NH3+, (HO—CH2—CH2—)3NH+, and; Y is a radical of an amine of formula (4). The inventive addition compounds are used as dispersing agents of solids, for example, pigments, particularly in aqueous media.
    Type: Application
    Filed: August 26, 2003
    Publication date: June 17, 2004
    Inventors: Martin Alexander Winter, Joachim Metz, Andreas Harz, Andreas Pfrengle
  • Patent number: 6559336
    Abstract: There is provided a single-step process for the preparation of a compound of formula I. Compounds of formula I are useful as starting materials in the synthesis of natural products and in the manufacture of benzophenone fungicidal agents.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: May 6, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Pfrengle, Robert J. H. Scheffer, Stefan Scheiblich, Jan Hendrik Wevers, Uwe Josef Vogelbacher, Robert F. Doehner
  • Publication number: 20020128507
    Abstract: There is provided a single-step process for the preparation of a compound of formula I.
    Type: Application
    Filed: October 12, 2001
    Publication date: September 12, 2002
    Applicant: BASF Aktiengesellschaft
    Inventors: Andreas Pfrengle, Robert J.H. Scheffer, Stefan Scheiblich, Jan Hendrik Wevers, Uwe Josef Vogelbacher, Robert F. Doehner