Patents by Inventor Elke Jenewein

Elke Jenewein 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).

  • Synergistic flame retardant combination of salts of 1-hydroxy-dihydrophosphole oxides and/or 1-hydroxyphospholane oxides and nitrogen compounds for use in polymers
    Patent number: 6509401
    Abstract: The present invention relates to a synergistic flame retardant combination for thermoplastic polymers which comprises as component A a salt of 1-hydroxydihydrophosphole oxides of the formula (Ia) or formula (Ib) and/or 1-hydroxyphospholane oxides of the formula (II) and as component B a nitrogen compound of the formula (III) to (VIII) or a mixture of the compounds designated by the formulae in which the substituents are as defined in the description.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: January 21, 2003
    Assignee: Clariant GmbH
    Inventors: Elke Jenewein, Bernd Nass, Wolfgang Wanzke
  • Synergistic flame protection agent combination for thermoplastic polymers
    Patent number: 6365071
    Abstract: The present invention relates to a synergistic flame retardant combination for thermoplastic polymers, preferably engineering plastics, especially for polyesters, which as component A comprises a phosphinic salt of the formula (I) defined in the description and/or a diphosphinic salt of the formula (II) and/or polymers thereof, and as component B comprises a nitrogen compound of the formula (III) to (VIII) defined in the description, or a mixture of the compounds represented by the formulae.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: April 2, 2002
    Assignee: Clariant GmbH
    Inventors: Elke Jenewein, Hans-Jerg Kleiner, Wolfgang Wanzke, Winfried Budzinsky
  • Alkyl-1-alkoxyethylphosphinous acid aluminum salts
    Patent number: 6229044
    Abstract: Aluminum salts of alky-(1-alkoxyethyl)phosphinic acids are prepared by reacting alky-(1-alkoxyethyl)phospihnic acids with aluminum hydroxide in a molar ratio of 3:1. The resulting aluminum phosphinates are used as flame retardants in thermoplastics, particularly in polyesters.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: May 8, 2001
    Assignee: Ticona GmbH Deutschland KG
    Inventors: Hans-Jerg Kleiner, Elke Jenewein, Wolfgang Wanzke