Patents by Inventor Dirk Springer

Dirk Springer 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 producing glucoprotamines
    Patent number: 6331607
    Abstract: A process for producing glucoprotamines by condensation of N-substituted propylene diamines with 2-aminoglutaric compounds in which the reaction is carried out in the presence of aminosilicones is disclosed. Glucoprotamines produced in accordance with the disclosed process exhibit improved color quality and longer storage stability.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: December 18, 2001
    Assignee: Cognis Deutschland GmbH
    Inventors: Ralf Bohlander, Sven Jaensch, Dirk Springer
  • Process for the production of Guerbet alcohols
    Patent number: 5777183
    Abstract: The invention relates to a process for the production of Guerbet alcohols by condensation of aliphatic alcohols in the presence of alkali metal or alkaline earth metal hydroxides as catalyst using the Guerbet reaction, in which the initial pressure in the reactor corresponds to the vapor pressure of the alcohol components used and, during the reaction, the pressure is continually reduced to the vapor pressure of the reaction mixture at the particular temperature.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: July 7, 1998
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Gerd Mueller, Bernhardt Gutsche, Lutz Jeromin, Udo Steinberner, Reinhold Sedelies, Ralf Bohlander, Richard Ridinger, Dirk Springer, Franz Buettgen, Frank Bartschik
  • Process for the sulfonation and/or sulfatization of organic components with SO.sub.3 in an organic reaction medium
    Patent number: 4973686
    Abstract: The invention relates to the use of selected carboxylic acid esters which are liquid under reaction conditions and correspond to general formula (I)X--COOR.sup.1 (I)in which R.sup.1 is an alkyl radical unbranched in the .alpha.-position and X is hydrogen or a group corresponding to general formula (II) ##STR1## in which R.sup.2, R.sup.3 and R.sup.4 represent fluorine and/or chlorine and one of these substituents may also be hydrogen or one or two of these substituents may also be lower alkyl, as reaction medium for the sulfonation and/or sulfatization or organic components with SO.sub.3 to light-colored reaction products.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: November 27, 1990
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Josef Kretschmann, Franz-Josef Carduck, Willi Wuest, Hubert Harth, Dirk Springer
  • Conversion of organophosphonic acids into their salts using intense shear
    Patent number: 4851525
    Abstract: Process for the conversion of an organophosphonic acid of the formula ##STR1## in which n=3-5 and R=H or C.sub.1 -C.sub.3 alkyl, into an alkali metal or ammonium salt comprising reacting the moist filter cake which accumulates during the production of organophosphonic acids by known processes (water content 10 to 40% by weight) with anhydrous or concentrated aqueous alkali metal hydroxide or ammonia and exposing the paste formed, which has a water content of from 20 to 80% by weight, to intense shear forces in mixing, dispersing, or kneading units, water being removed from the paste under reduced pressure and with application of heat until the paste changes into a free-flowing powder.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: July 25, 1989
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Willi Wuest, Hubert Harth, Dirk Springer, Franz Foerg