Patents by Inventor Gert Roessler

Gert Roessler 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).

  • Production of 2, 3-epoxypropyl trialkyl ammonium chlorides
    Patent number: 5637740
    Abstract: The reaction mixture obtained in the production of 2,3-epoxypropyltrialkylammonium chlorides by treatment of chlorohydroxypropyltrialkylammonium chlorides with alkaline acting materials in aqueous medium containing impurities which create problems in the subsequent use of the 2,3-epoxypropyltrialkylammonium chloride. According to the invention the reaction mixture is freed from these impurities by separating it from undissolved impurities by employing at least about 0.2 mole of 2,3-epoxypropyltrialkylammonium chloride per mole of water.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: June 10, 1997
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Fischer, Manfred Langer, Gert Roessler
  • Method of manufacturing an adjustable-viscosity cationic starch
    Patent number: 5116967
    Abstract: The invention relates to a method of preparing an adjustable-viscosity cationized starch in which, in a process step in the presence of 10 to 35 wt. % water and preferably 0.01 to 2.00 wt. % of a finely-divided silica and/or silicate (in each case relative to the total amount of mixture) the starch is homogenized with an alkaline oxide, hydroxide, silicate aluminate or mixtures thereof, an alkylene epoxide and a peroxo compound or a mixture of at least two peroxo compounds and then boiled in known manner at the desired time.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: May 26, 1992
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Fischer, Dietmar Bischoff, Michael Huss, Reinhard Stober, Gert Roessler