Patents by Inventor Alexander Tishkov

Alexander Tishkov 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 preparing 6-chlorodibenzo[D,F][1,3,2]dioxaphosphepin
    Patent number: 8841474
    Abstract: The present invention relates to a process for preparing 6-chlorodibenzo[d,f][1,3,2]dioxaphosphepin (I) which comprises reacting 2,2?-dihydroxybiphenyl with PCl3 in the presence of a catalytic amount of an acid salt of a nitrogen base, wherein the reaction is carried out in the absence of external organic solvents.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: September 23, 2014
    Assignee: BASF SE
    Inventors: Ulrich Berens, Holger Ganz, Franz Niklaus Windlin, Alexander Tishkov
  • Unsaturated diphosphine monoxides
    Patent number: 8541612
    Abstract: The present invention relates to unsaturated diphosphine monoxides, to a process for preparation thereof and to the use thereof as flame retardants.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: September 24, 2013
    Assignee: BASF SE
    Inventors: Alexander Tishkov, Klemens Massonne
  • Cyclic phosphines as flame retardants
    Patent number: 8519035
    Abstract: The present invention is related to the use of specific cyclic and/or polymeric aryl-phosphines as flame retardants and to a method for reducing the flammability of organic material by incorporating into the material these specific cyclic and/or polymeric phosphines. Moreover, the invention is related to a polymeric composition containing a polymeric material and at least one of the specific cyclic and/or polymeric phosphines in an amount of from 1 to 15% by weight, based on the weight of the polymeric material. The invention also relates to a composition comprising at least one of the specific cyclic and/or polymeric phosphines and at least one polymerizable monomer.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: August 27, 2013
    Assignee: BASF SE
    Inventors: Alexander Tishkov, Gunter Scherhag, Klemens Massonne, Matthias Maase, Calvin Emanuel, Larry D. Timberlake, Mark V. Hanson
  • Derivatives of diphosphines as flame retardants in aromatic and/or heteroaromatic epoxy resins
    Publication number: 20120251810
    Abstract: The present invention is related to the use of specific derivatives of diphosphines as flame retardants in aromatic and heteroaromatic epoxy resins and to a method for reducing the flammability of organic material comprising aromatic and/or heteroaromatic epoxy resins in which the specific derivates of diphosphines are incorporated. Moreover, the invention is related to an aromatic and/or heteroaromatic epoxy resin composition containing aromatic and heteroaromatic epoxy resin as such or in processed form and incorporated in the aromatic and/or heteroaromatic epoxy resin at least one of the derivatives of diphosphines in an amount of from 1 to 35% by weight, based on the weight of the aromatic and/or heteroaromatic epoxy resin.
    Type: Application
    Filed: July 21, 2010
    Publication date: October 4, 2012
    Applicant: BASF SE
    Inventors: Hartmut Denecke, Alexander Tishkov, Norbert Gutfrucht, Heinz Herbst, Matthias Maase, Rainer Xalter, Christoph Fleckenstein
  • CYCLIC PHOSPHINES AS FLAME RETARDANTS
    Publication number: 20110263764
    Abstract: The present invention is related to the use of specific cyclic and/or polymeric aryl-phosphines as flame retardants and to a method for reducing the flammability of organic material by incorporating into the material these specific cyclic and/or polymeric phosphines. Moreover, the invention is related to a polymeric composition containing a polymeric material and at least one of the specific cyclic and/or polymeric phosphines in an amount of from 1 to 15% by weight, based on the weight of the polymeric material. The invention also relates to a composition comprising at least one of the specific cyclic and/or polymeric phosphines and at least one polymerizable monomer.
    Type: Application
    Filed: September 3, 2008
    Publication date: October 27, 2011
    Applicant: BASF SE
    Inventors: Alexander Tishkov, Gunter Scherhag, Klemens Massonne, Matthias Maase, Calvin Emanuel, Larry D. Timberlake, Mark V. Hanson
  • UNSATURATED DIPHOSPHINE MONOXIDES
    Publication number: 20110034734
    Abstract: The present invention relates to unsaturated diphosphine monoxides, to a process for preparation thereof and to the use thereof as flame retardants.
    Type: Application
    Filed: March 23, 2009
    Publication date: February 10, 2011
    Applicant: BASF SE
    Inventors: Alexander Tishkov, Klemens Massonne
  • METHOD FOR SYNTHESIZING CYCLOHEXYL-SUBSTITUTED PHOSPHINES
    Publication number: 20100137643
    Abstract: The present invention relates to a process for preparing cyclohexyl-substituted phosphines. The invention further relates to a process for preparing cyclohexyl-substituted phosphine oxides which can be used as intermediates in the preparation of cyclohexyl-substituted phosphines.
    Type: Application
    Filed: May 7, 2008
    Publication date: June 3, 2010
    Applicant: Basf SE
    Inventors: Alexander Tishkov, Klemens Massonne, Daniela Mirk, Jochem Henkelmann, Matthias Maase, Thomas Wettling