Patents by Inventor Karlheinz Neisius

Karlheinz Neisius 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 development of relief structures based on radiation-crosslinked polymeric precursors of polymers which are resistant to high temperature
    Patent number: 4539288
    Abstract: An improved development process for relief structures based on radiation-crosslinked polymeric precursors of polymers which are resistant to high temperature in which the development fluid used is an aliphatic or cycloaliphatic ketone having 3 to 7 carbon atoms, is distinguished by rapid and complete removal of soluble polymeric material from the substrate with, at the same time, a minimum amount of attack on the radiation-crosslinked polymeric structures.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: September 3, 1985
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Hans-Joachim Merrem, Karlheinz Neisius, Rudolf Klug, Hartmut Hartner
  • 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
  • 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