Patents by Inventor Adolf Winkler

Adolf Winkler 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: 6750354
    Abstract: The invention relates to a process for the alkylation of 3,4-dihydroxythiophene-2,5-dicarboxylic esters or their alkali metal or alkaline earth metal salts with alkylating agents in a polar diluent in the presence of quaternary onium salts.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: June 15, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: G√ľnter Rauchschwalbe, Alexander Klausener, Josef Bremen, Ralf-Ingo Schenkel, Adolf Winkler
  • Publication number: 20030097007
    Abstract: The invention relates to a process for the alkylation of 3,4-dihydroxythiophene-2, 5-dicarboxylic esters or their alkali metal or alkaline earth metal salts with alkylating agents in a polar diluent in the presence of quaternary onium salts.
    Type: Application
    Filed: September 27, 2002
    Publication date: May 22, 2003
    Inventors: Gunter Rauchschwalbe, Alexander Klausener, Josef Bremen, Ralf-Ingo Schenkel, Adolf Winkler
  • Patent number: 5976324
    Abstract: A process as been found for the removal of water from reaction mixtures of acids or acid anhydrides or of aqueous alkali metal hydroxide solutions with alcohols using vapor permeation/pervaporation at the boiling point of the reaction mixture, which includes initially introducing the lowest-boiling educt in less than the stoichiometric amount, based on the other particular educt, together with this other educt, heating the reaction mixture to the boiling point and freeing the vapor mixture, which is formed from the boiling reaction mixture and includes chiefly water and the lowest-boiling component, from water on a membrane, recycling the vapor mixture which has been freed from water into the reaction mixture and topping up the reaction mixture with the lowest-boiling educt in the course of the reaction.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: November 2, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andreas Groschl, Adolf Winkler, Josef Bremen
  • Patent number: 5243013
    Abstract: The new polyester polyols, which have an acid value below 10, a hydroxyl value of 50 to 200, a hydroxyl functionality above 2 and a number average molecular weight M.sub.n of 800 to 5,000 and which are liquid at 23.degree. C. or are homogeneously soluble in di-2-ethylhexyl phthalate in a concentration of at least 70% by weight, the viscosity of the 70% solution being from 1 to 35 Pa.s, are used as anchoring agents for polymer systems and as polymeric plasticizers.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: September 7, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut Hurnik, Gerhard Trummelmeyer, Adolf Winkler
  • Patent number: 4426333
    Abstract: The invention relates to a process for the preparation of 1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K acid) by reacting 1-amino-8-hydroxynaphthalene-4,6-disulphonic acid (K acid) with benzoylating agents, according to which process mixtures of aminonaphtholdisulphonic acid isomers are used instead of pure K acid, which mixtures contain over 40% by weight of K acid, relative to the total amount of diazotizable compounds in the mixture of isomers, and in which no other single isomer has a proportion which exceeds 10% by weight of the total amount of diazotizable compounds in the mixture of isomers.
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: January 17, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erich Hammerschmidt, Horst Behre, Bruno Kruger, Adolf Winkler
  • Patent number: 4421694
    Abstract: The invention relates to a process for the preparation of nitroanilines by the reaction of chloronitrobenzenes with ammonia at elevated temperature and under elevated pressure, and in the presence of chlorinated aromatic hydrocarbons.Nitroanilines are important precursors and intermediate products for the preparation of dyestuffs, pharmaceuticals and plant protection agents.
    Type: Grant
    Filed: January 20, 1982
    Date of Patent: December 20, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bruno Kruger, Adolf Winkler, Gunter Hentze
  • Patent number: 4120866
    Abstract: A process for the production of an arylsulphonium salt, comprising reacting an aromatic compound of the formulaAr--Hin which Ar is an aromatic radical with a sulphoxide of the formula ##STR1## in which R.sup.1 and R.sup.2 each independently is an aliphatic or aromatic radical or, together, a divalent radical, in the presence of hydrogen fluoride. The products are known and can be converted to arylthioethers which are intermediates for other known syntheses.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: October 17, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventor: Adolf Winkler