Patents by Inventor Gerhard Kreuzburg

Gerhard Kreuzburg 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).

  • Granular quartz glass product
    Patent number: 4243422
    Abstract: Method of preparing granular quartz glass which comprises heating a porous granulated silica gel having an alkoxy group content equal to or less than 1 weight percent and a total impurity content of less than 1 part per million, the porous granulated silica gel obtained by hydrolysis of an orthosilicic acid ester of an aliphatic alcohol at a temperature up to 1400.degree. C.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: January 6, 1981
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Arnold Lenz, Gerhard Kreuzburg, Rainer Haase
  • Method of preparing orthosilicic acid alkyl esters
    Patent number: 4185029
    Abstract: A process for preparing an orthosilicic acid tetraalkyl ester having 2 to 6 carbon atoms in the ester group which comprises contacting metallic silicon with an alcohol corresponding to the ester group in the presence of the corresponding alkali alcoholate:A. in the presence of a surface active substance;B. in the presence of a compound containing a methoxy group; orC. under pressure at a temperature above the boiling point of the reaction mixture.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: January 22, 1980
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Gerhard Kreuzburg, Arnold Lenz, Walter Rogler
  • Method of preparing orthosilicic acid alkyl esters
    Patent number: 4113761
    Abstract: A process for preparing an orthosilicic acid tetraalkyl ester having 2 to 6 carbon atoms in the ester group which comprises contacting metallic silicon with an alcohol corresponding to the ester group in the presence of the corresponding alkali alcoholate:A. in the presence of a surface active substance;B. in the presence of a compound containing a methoxy group; orC. under pressure at a temperature above the boiling point of the reaction mixture.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: September 12, 1978
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Gerhard Kreuzburg, Arnold Lenz, Walter Rogler
  • Process for the production of granular quartz glass
    Patent number: 4098595
    Abstract: Method of preparing granular quartz glass which comprises heating a porous granulated silica gel having an alkoxy group content equal to or less than 1 weight percent and a total impurity content of less than 1 part per million, the porous granulated silica gel obtained by hydrolysis of an orthosilicic acid ester of an aliphatic alcohol at a temperature up to 1400.degree. C.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: July 4, 1978
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Arnold Lenz, Gerhard Kreuzburg, Rainer Haase