Patents by Inventor Sigrid Scholz-Weigl

Sigrid Scholz-Weigl 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).

  • Process for the peparation of finely divided, water-swellable polysaccharide graft polymers
    Patent number: 5183872
    Abstract: Polysaccharide graft polymers are prepared by semi-continuous reverse-phase suspension polymerization, partial dewatering and crosslinking, wherein during and after the suspension polymerization, in which an aqueous solution of an at least partially neutralized, olefinically unsaturated carboxylic acid is added to a suspension of a polysaccharide in a nonpolar organic solvent, the viscosity is reduced by adding amphoteric ammonium compounds or quaternary imidazolinium salts to the reaction medium.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: February 2, 1993
    Assignee: Starchem GmbH
    Inventors: Klaus Heidel, Sigrid Scholz-Weigl
  • Use of N-oxalkylated derivatives of aniline as a polymer-dissolving component in floor cleaners
    Patent number: 4425266
    Abstract: N-oxalkylated derivatives of aniline of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is hydrogen, NH.sub.2, or lower alkyl;R.sub.3 is hydrogen or lower alkyl,R.sub.4 is hydrogen or methyl, andn is a number from 1.0 to 5.0,are useful as polymer-dissolving components in floor cleaners.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: January 10, 1984
    Assignee: Chemische Werke Huels Aktiengesellschaft
    Inventors: Rudolf Beck, Sigrid Scholz-Weigl
  • Foam inhibited or attenuated washing, cleaning and rinsing agents for dishes and utensils
    Patent number: 3993605
    Abstract: Foam-controlled washing and cleaning and dishwashing composition, containing conventional detergents and additives, which are improved by the addition of about 20 - 70 percent by weight based on the total surfactant material of vicinal alkane diol mono and/or diesters of the formula ##EQU1## where R is hydrogen, linear or branched alkyl of 1 to 12 carbon atoms or phenyl; R' is hydrogen or ##EQU2## n is zero or an integer from 1 to 28, m is zero or an integer from 1 to 28 and where n+m are integers from 10 to 30.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: November 23, 1976
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Sigrid Scholz-Weigl, Ferdinand VON Praun