Patents by Inventor Christoph Thiebes

Christoph Thiebes 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).

  • Bridged perinones/quinophthalones
    Publication number: 20030139498
    Abstract: Disclosed herein are bridged perinones/quinophthalones of the general formula (I) or tautomeric forms thereof 1
    Type: Application
    Filed: November 22, 2002
    Publication date: July 24, 2003
    Inventors: Christoph Thiebes, Josef-Walter Stawitz, Ulrich Feldhues
  • Preparation of styryl dyes
    Publication number: 20030061670
    Abstract: Process for preparing compounds of the formula (I) 1
    Type: Application
    Filed: August 19, 2002
    Publication date: April 3, 2003
    Inventors: Josef-Walter Stawitz, Stephan Michaelis, Christoph Thiebes
  • Preparation of 1-amino-4-hydroxyanthraquinones
    Publication number: 20030045735
    Abstract: The present invention relates to a process for preparing 1-amino-4-hydroxyanthraquinones of the formula (I) 1
    Type: Application
    Filed: August 15, 2002
    Publication date: March 6, 2003
    Inventors: Christoph Thiebes, Josef-Walter Stawitz
  • Process for preparing asymmetrical methine dyes
    Patent number: 6465659
    Abstract: Reaction of pyrazolones and methyleneindolines with orthoformic esters is an advantageous one-step process for preparing asymmetrical methine dyes.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: October 15, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef-Walter Stawitz, Karl-Heinz Reinhardt, Christoph Thiebes
  • PROCESS FOR PREPARING ASYMMETRICAL METHINE DYES
    Publication number: 20020128489
    Abstract: Reaction of pyrazolones and methyleneindolines with orthoformic esters is an advantageous one-step process for preparing asymmetrical methine dyes.
    Type: Application
    Filed: March 5, 2002
    Publication date: September 12, 2002
    Inventors: Josef-Walter Stawitz, Karl-Heinz Reinhardt, Christoph Thiebes