Patents by Inventor Kurt-Peter Meurer

Kurt-Peter Meurer 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).

  • Purification of p,p-bisphenolate solutions
    Patent number: 5959160
    Abstract: The invention relates to a process for the purification of p,p-bisphenolate solutions such as are obtained in the production of bisphenolates from soda lye and bisphenols by extraction.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: September 28, 1999
    Assignee: Bayer AG
    Inventors: Claus Wulff, Kurt-Peter Meurer, Tony van Osselaer, Roelof Boyens, Jurgen Hinz
  • Process for the purification of bisphenol
    Patent number: 5785823
    Abstract: A process for preparing bisphenol A which has a purity of at least 99.95 wt. % of p,p-bisphenol A (BPA). Thermally stable and colour-stable BPA purified in accordance with the invention produces improved thermal and colour stability and improved optical transparency in polymers such as e.g. polycarbonates prepared therefrom.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: July 28, 1998
    Assignee: Bayer AG Konzernverwaltung RP
    Inventors: Kurt-Peter Meurer, Tony Van Osselaer, Werner Verhoeven, Johan Vaes, Ignace Hooftman, Willy Van Herck, Claus Wulff, Jurgen Hinz, Alfred Eitel, Kaspar Hallenberger
  • Crystalline adduct of bisphenol A and bisphenol TMC
    Patent number: 5756860
    Abstract: The invention relates to the preparation of a transparent crystalline adduct consisting of bisphenol A (75 parts) and bisphenol TMC (25 parts), which has a melting point of 144.degree. C. which is below the melting points of the pure starting compounds bisphenol A (157.degree. C.) and bisphenol TMC (208.degree. C.).
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: May 26, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kurt-Peter Meurer, Tony Van Osselaer, Claus Wulff, Jurgen Hinz
  • Method for the preparation of ultra-pure bisphenol A and the use thereof
    Patent number: 5696295
    Abstract: The invention relates to a method for the purification by distillation of p,p-bisphenol A from the melt.The p,p-bisphenol A melt thus obtained is highly heat-stable, stable in storage and colour-stable, is free from high-boiling components and no longer contains any surface-active or non-distillable metal, salt, acid or polymer components and no sulphur-containing components; o,p-BPA and phenol are removed and the low-boiling components are scarcely detectable.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: December 9, 1997
    Assignee: Bayer AG
    Inventors: Claus Wulff, Kaspar Hallenberger, Heinrich Steude, Kurt-Peter Meurer, Tony van Osselaer, Jurgen Hinz, Frank Quaeyhaegens, Johan Vaes, Ignace Hooftman
  • Solution polymerization for the preparation of gel-free ethylene/vinyl acetate copolymers
    Patent number: 4937303
    Abstract: High molecular weight, gel-free ethylene/vinyl acetate copolymers may be prepared by the process of solution polymerization if a particular relationship of temperature/pressure is observed.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: June 26, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard A. Wolf, Bernhard Will, Werner Obrecht, Rudolf Casper, Wolfgang Baade, Gerd Sylvester, Kurt-Peter Meurer, Hugo Zimmermann