Patents by Inventor Willi Wintermeyer

Willi Wintermeyer 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).

  • Chromatography column and process for packing same
    Patent number: 4732687
    Abstract: Columns for high-pressure liquid chromatography utilize a tube which can be filled with a sorbent. The tube has an inlet device and an outlet device at the ends thereof and includes supporting elements therein to stabilize the sorbent packing.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: March 22, 1988
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Peter Muller, Werner Gunkel, Gunther Sattler, Willi Wintermeyer
  • Optically active 1-(4-methoxybenzyl)-1,2,3,4,5,6,7,8-octahydroisoquinolinium acetates
    Patent number: 4727147
    Abstract: Racemic 1-(4-methoxybenzyl)-1,2,3,4,5,6,7,8-octahydroisoquinoline can be resolved by seeding the supersaturated solution of racemic 1-(4-methoxybenzyl)-octahydroisoquinolinium acetate with its enantiomeric forms and crystallizing the optically active acetate corresponding to the configuration of the seed crystals. The continuous form of the process permits obtaining the two enantiomers together.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: February 23, 1988
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Willi Wintermeyer, Fritz Reiff, Hans R. Muller, Josef Conti
  • Process for separating and recovering metal catalysts
    Patent number: 4414401
    Abstract: A process is provided for separating and recovering solid, metal catalysts from reaction mixtures in which they are dispersed, with cross-flow filtration using membrane separation devices. The process is particularly useful for separating gelatinous catalyst sludges, e.g., nickel hydroxide, used in oxidizing diacetone sorbose.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: November 8, 1983
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Willi Wintermeyer, Rolf Wittmann, Jurgen Butzke
  • Preparation of diacetoneketogulonic acid by oxidation of diacetonesorbose
    Patent number: 4387245
    Abstract: A process for preparing diacetoneketogulonic acid comprises oxidizing diacetonesorbose in two or more oxidizing steps using different oxidizing agents in each step. In preferred embodiments the first oxidation is done electrochemically or using air and the second oxidation is via hypochlorite treatment.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: June 7, 1983
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Rolf Wittmann, Willi Wintermeyer, Jurgen Butzke
  • Preparation of diacetone-ketogulonic acid
    Patent number: 4375393
    Abstract: A process for preparing diacetone-ketogulonic acid comprises oxidizing diacetonesorbose to diacetone-ketogulonic acid to an extent of about 30-95% by electrochemical oxidation or O.sub.2 oxidation; electrodialysing the resultant reaction solution to separate the pure diacetoneketogulonic acid from the unoxidized diacetonesorbose; and recycling the unoxidized diacetone-sorbose to the oxidation step.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: March 1, 1983
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Fritz Reiff, Willi Wintermeyer, Rolf Wittmann, Jurgen Butzke, Peter Muller