Patents by Inventor Otto Mattner

Otto Mattner 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).

  • Thermal cleavage of carbamic esters
    Patent number: 5616784
    Abstract: In a reactor for the thermal cleavage of mono- and polyfunctional carbamic esters into the corresponding isocyanates and the hydroxyl component in the liquid phase, the geometry of the reactor, defined by the degassing area in relation to the volume and the arrangement of the heating surfaces, permits cleavage in a two-phase mixture which has a volumetric gas content of more than 50%.
    Type: Grant
    Filed: December 11, 1995
    Date of Patent: April 1, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans V. Schwarz, Andreas Otterbach, Otto Mattner, Franz Merger, Wolfgang Schwarz, Eckhardt Brandt, Peter Magnussen, Roland Minges
  • Multistep, continuous preparation of organic polyisocyanates
    Patent number: 5386053
    Abstract: A multistep process for the continuous preparation of organic polyisocyanates, preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to give monomeric polyurethanes and pyrolyzing the latter involves separating the resultant polyisocyanates and worthless residues in certain reaction steps and recycling the reusable by-products into earlier steps.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: January 31, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Otterbach, Hans V. Schwarz, Franz Merger, Wolfgang Schwarz, Eckhardt Brandt, Peter Magnussen, Otto Mattner
  • Process for the preparation of isocyanates through the thermal cleavage of urethanes
    Patent number: 4530796
    Abstract: A process for the pyrolysis of mono-, di-, and polyurethanes to the corresponding mono-, di-, and polyisocyanates wherein the urethane to be cleaved is heated under pressure and sprayed through a nozzle into a pyrolysis chamber maintained at reduced pressure. The isocyanate and alcohol cleavage products are separated by fractional condensation.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: July 23, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto Mattner, Franz Merger, Friedrich Towae