Patents by Inventor Volker Hunger

Volker Hunger 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).

  • Method for preparation of orthosilicic acid tetraalkyl esters
    Patent number: 4224234
    Abstract: An improvement in the preparation of orthosilicic acid tetraalkyl esters by reaction of metallic silicon with alcohol in the presence of alkali alcoholate is disclosed, the improvement residing in carrying out the reaction in the co-presence of an ether alcohol or alkanolamine as cocatalyst.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: September 23, 1980
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Wilhelm Flick, Hermann Richtzenhain, Volker Hunger, Wilhelm Joch
  • Aqueous solutions of alkali polysilicates
    Patent number: 4120938
    Abstract: A process for the preparation of an aqueous alkali metal polysilicate solution having an SiO.sub.2 : alkali metal oxide mole ratio of 2.5 - 5.5 : 1 and a silica content of 16 - 23% by weight which comprises contacting a tetraalkoxysilane of the formula Si(OR).sub.4 wherein each R is independently a straight or branched-chain alkyl group of 1 to 3 carbon atoms with an aqueous alkali metal hydroxide solution at a temperature between room temperature and the boiling point of the reaction mixture and at a temperature up to 100.degree. C. distilling over alcohol formed by the reaction of the silane with the alkali metal hydroxide.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: October 17, 1978
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Rainer Haase, Volker Hunger, Arnold Lenz
  • Method of manufacturing aqueous solutions of alkali polysilicates
    Patent number: 3984526
    Abstract: A process for the preparation of an aqueous alkali metal polysilicate solution having an SiO.sub.2 : alkali metal oxide mole ratio of 2.5 - 5.5 : 1 and a silica content of 16 - 23% by weight which comprises contacting a tetraalkoxysilane of the formula Si(OR).sub.4 wherein each R is independently a straight or branched-chain alkyl group of 1 to 3 carbon atoms with an aqueous alkali metal hydroxide solution at a temperature between room temperature and the boiling point of the reaction mixture and at a temperature up to 100.degree.C. distilling over alcohol formed by the reaction of the silane with the alkali metal hydroxide.
    Type: Grant
    Filed: August 12, 1974
    Date of Patent: October 5, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Rainer Haase, Volker Hunger, Arnold Lenz