Patents by Inventor Ulrich Leyrer

Ulrich Leyrer 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: 9284401
    Abstract: The present invention provides a process for the preparation of polyols based on fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms and the use thereof for the preparation of polyurethane materials.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: March 15, 2016
    Assignees: Bayer MaterialScience LLC, Bayer MaterialScience AG
    Inventors: Klaus Lorenz, Reinhard Albers, Frank Otto, Ulrich Leyrer, Don S. Wardius, Keith J. Headley
  • Publication number: 20080114086
    Abstract: The present invention provides a process for the preparation of polyols based on fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms and the use thereof for the preparation of polyurethane materials.
    Type: Application
    Filed: March 5, 2007
    Publication date: May 15, 2008
    Inventors: Klaus Lorenz, Reinhard Albers, Frank Otto, Ulrich Leyrer, Don S. Wardius, Keith J. Headley
  • Publication number: 20060234008
    Abstract: A composite system having insulation properties is disclosed. The system includes a multi-wall profile and a thermal insulation element. The profile, made of a thermoplastic material includes a transparent upper plate and a radiation-absorbing lower plate that are joined together by webs; the webs extending in the longitudinal direction in such a manner that flow channels parallel one to the others are formed. The outer surface of the lower plate is joined to the thermal insulation element. The system is particularly suitable for use as solar collector.
    Type: Application
    Filed: April 3, 2006
    Publication date: October 19, 2006
    Inventors: Constantin Schwecke, Dieter Boesveld, Rudiger Utsch, Ulrich Leyrer, Peter Schwarz
  • Patent number: 5625045
    Abstract: High functionality, low viscosity, light colored sucrose-based polyethers are prepared by reacting a starter mixture containing i) approximately 100 parts by weight of sucrose, ii) from about 30 to about 1000 parts by weight of a low molecular weight, relatively high valency alcohol and/or an alkoxylation product of such an alcohol and iii) an alkali metal hydroxide which has been prepared at a temperature of from about 20.degree. to about 110.degree. C. with an alkylene oxide at a temperature of from about 90.degree. to about 130.degree. C. and at a pressure of from about 0.3 to about 4 bar excess nitrogen pressure. These polyether polyols are particularly useful for the production of polyurethanes, particularly rigid polyurethane foams.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: April 29, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Pramod Gupta, Hans-Joachim Sandhagen, Werner Betz, Ulrich Leyrer, Martin Hoppe
  • Patent number: 5134219
    Abstract: The substituted polyheterocycles containing recurring structural units corresponding to the formula ##STR1## in which X is an oxygen atom, a sulfur atom or N-H, show good solubility in mixtures of methanesulfonic acid and methylene chloride or trifluoroacetic acid and methylene chloride. They may be used for the production of mixtures with thermoplastic polymers.
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: July 28, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans R. Kricheldorf, Jurgen Engelhardt, Ralf Pakull, Volker Eckhardt, Ulrich Leyrer