Patents by Inventor Gunter Klug

Gunter Klug 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).

  • Process for the preparation of P-substituted O-benzylphenols
    Patent number: 5072017
    Abstract: Para-substituted o-benzylphenols are prepared by reacting p-substituted phenols with benzylating agents in the presence of zeolites of the faujasite type at elevated temperature.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 10, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Buysch, Gunter Klug, Peter Mues, Lothar Puppe
  • Process for the preparation of N-alkylated anilines
    Patent number: 5068434
    Abstract: N-alkylated anilines can be prepared by reaction of anilines with lower alcohols or dialkyl ethers at elevated temperature and in the presence of zeolite catalysts of the pentasil type containing protons and having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 60.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: November 26, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Klug, Hans-Josef Buysch, Lothar Puppe
  • Recording material
    Patent number: 5024987
    Abstract: Pressure-sensitive reactive recording material containinga) as the color-forming agent, a tetraindolylheptamethine ether or alcohol of the formulae I/1, I/2, I/3 or I/4 ##STR1## b) and, as the color developer, the salt of a polyvalent metal and an aromatic carboxylic acid having at least 10 carbon atoms, of the formula (II) ##STR2## wherein A, B, D and E denote ##STR3## and the other radicals have the meanings given in the description, produces light-stable copies which can also be read by machines (OCR).
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: June 18, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Klug, Gert Jabs, Horst Berneth, Artur Botta
  • Process for the preparation of n-alkylanilines
    Patent number: 4940817
    Abstract: N-Alkylanilines can be prepared by reaction of anilines with N,N-dialkylanilines in the gas or liquid phase at elevated temperature by carrying out the reaction in the presence of zeolites.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: July 10, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Klug, Hans-Josef Buysch, Lothar Puppe