Patents by Inventor Otto Trosken

Otto Trosken 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).

  • Sulfo-containing phenol-formaldehyde condensates
    Patent number: 4079040
    Abstract: Spreadability and/or strength of water-setting inorganic bonding compositions are improved by incorporating in them a water-soluble condensation product of formaldehyde with a diphenol ##STR1## The condensation can also take place in the presence of a water-soluble sulfite, a water-soluble sulfamate, a water-soluble pyrosulfite, a phenol sulfonic acid or a naphthalene sulfonic acid.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: March 14, 1978
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Joachim Ribka, Otto Trosken, Karlfried Keller, Erwin Herrmann, Wolfgang Bodenstedt, Peter Dorries
  • N-Acyloyl-N-alkyl-alkylenediamines as dye levelers
    Patent number: 3999942
    Abstract: N-Acyloyl-N'-alkyl-alkylenediamines of the formula ##STR1## are prepared by reacting N-alkyl alkylenediamines with a derivative of a di-carboxylic acid. The compounds and their salts are useful as levelling auxiliaries for the dyeing of polyacrylonitrile or polyester with basic dyestuffs. Advantageously, the compounds are employed in conjunction with a non-ionic dispersing agent, for example a polyethoxylated fatty alcohol, and a solvent to give an electrolyte-insensitive dye bath.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: December 28, 1976
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Christian Heid, Karl-Heinz Keil, Joachim Ribka, Otto Trosken, Gerhard Weckler, Siegfried Wirth