Patents by Inventor Wilhelm Baumer

Wilhelm Baumer 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).

  • Etching medium and process for the correction of chromed gravure cylinders
    Patent number: 4308091
    Abstract: An etching medium for chromed surfaces, comprises amounts of aluminum chloride, hydrochloric acid and an inorganic reducing agent, effective for etching a chromed surface. This medium is particularly advantageous when used for the correction of chromed gravure cylinders.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: December 29, 1981
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Dieter Schmitt, Wilhelm Baumer
  • Lustrous pigments for pigmenting casein plastics
    Patent number: 4128435
    Abstract: Pigmented substantially crack-free casein plastic compositions containing a minor, luster-imparting quantity of coated mica platelets, wherein at least 75% of the pigment particles possess an average platelet size of below 10 .mu.m., a thickness of about 0.1 to 0.7 .mu.m. and a ratio of diameter to thickness of about 10 to 200.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: December 5, 1978
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Wilhelm Baumer, Horst Bernhard, Reiner Esselborn, Jorg Ohngemach, Otto Stahlecker, Fritz Zureda
  • Method for stripping photolacquers
    Patent number: 4070203
    Abstract: Hardened photolacquer on semi-conductors and integrated circuits for etching purposes are stripped therefrom employing, preferably at a temperature above 75.degree. C., a stripping composition consisting essentially of 20-50 weight percent of at least one alkylbenzenesulfonic acid of 12-20 carbon, and 80-50 weight percent of a chlorine-free, aromatic hydrocarbon having a boiling point above 150.degree. C.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: January 24, 1978
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Karl Heinz Neisius, Wilhelm Baumer
  • Non-bleeding indicator and dyes therefor
    Patent number: 4029598
    Abstract: In indicators comprising a carrier such as cellulose saturated with one or more azo dyes having reactive groups capable of forming a chemical bond with the carrier material, the improvement wherein the indicator is made non-bleeding by using such dyes which, in addition to the reactive group, contain at least one additional sulfonic acid and/or carboxylic acid group, an example of such a dye being 4-anilino-3'-(2-hydroxysulfonyloxyethylsulfonyl)-azobenzene-6'-carboxylic acid.
    Type: Grant
    Filed: March 14, 1969
    Date of Patent: June 14, 1977
    Assignee: E. Merck A. G.
    Inventors: Karlheinz Neisius, Wilhelm Baumer
  • Non-bleeding indicators and dyes therefor used in pH determination process
    Patent number: 4029597
    Abstract: In colorimetric indicators comprising a carrier such as cellulose saturated with one or more azo dyes having reactive groups capable of forming a chemical bond with the carrier material, the improvement wherein the indicator is made non-bleeding by using such dyes which, in addition to the reactive group, contain at least one additional sulfonic acid and/or carboxylic acid group, an example of such a dye being 4-anilino-3'-(2-hydroxysulfonyloxyethylsulfonyl)-azobenzene-6'-carboxylic acid.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: June 14, 1977
    Assignee: E. Merck A. G.
    Inventors: Karlheinz Neisius, Wilhelm Baumer