Patents by Inventor Jürgen Schlo?macher

Jürgen Schlo?macher 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 polyester polyols having low amounts of dioxane waste
    Patent number: 8592623
    Abstract: Polyester polyols are produced from at least one carboxylic acid hydride and diethylene glycol by a process in which the formation of 1,4-dioxane is suppressed. These polyester polyols are useful for producing polyurethane (PUR) and polyisocyanurate (PIR) foams and metal composite elements containing these PUR or PIR foams.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: November 26, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Rolf Roers, Hartmut Nefzger, Erika Bauer, Johannes Van De Braak, Torsten Heinemann, Jürgen Schloβmacher
  • Process for the production of polyester polyols with low volumes of dioxane waste
    Patent number: 8481606
    Abstract: The invention relates to the production and use of polyester polyols, formed from at least one carboxylic acid anhydride and ethylene glycol, wherein a specialized reaction control substantially suppresses the formation of 1,4-dioxane from diethylene glycol.
    Type: Grant
    Filed: October 24, 2009
    Date of Patent: July 9, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Hartmut Nefzger, Erika Bauer, Johannes Van de Braak, Jürgen Schloβmacher
  • Polyester polyols from terephthalic acid and oligoalkylene oxides
    Patent number: 8334035
    Abstract: Polyester polyols are produced by reacting terephthalic acid with a glycol corresponding to the formula H—(OCH2CH2)n—OH and an aliphatic dicarboxylic acid. These polyester polyols are particularly useful for the production of polyurethane) (PUR) and polyurethane/polyisocyanurate (PUR/PIR) foams for use in insulation applications.
    Type: Grant
    Filed: March 27, 2010
    Date of Patent: December 18, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Hartmut Nefzger, Erika Bauer, Uwe Kuenzel, Jürgen Schloβmacher, Lutz Brassat