Patents by Inventor Silke Scheiding

Silke Scheiding 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).

  • Patent number: 5480985
    Abstract: A process for preparing branched cyclodextrins has at least one cyclodextrin or cyclodextrin derivative reacted with at least one glycosyl donor in a molar ratio of cyclodextrin/glycosyl donor of from 1:1 to 1:20, in the presence of a catalyst, and in a solvent.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: January 2, 1996
    Assignee: Consortium fur Elecktrochemische Industrie GmbH
    Inventors: Rolf Hirsenkorn, Petra Grauvogl, Silke Scheiding
  • Patent number: 5468890
    Abstract: The invention concerns iodonium salts of the general formula A-I.sup.+ --B X.sup.-, in which A is a group of the general formula ##STR1## in which C is a monovalent aromatic hydrocarbon group with 6 to 14 carbon atoms or a monovalent aromatic hydrocarbon group containing at least one oxygen and/or sulphur atom and with 5 to 14 atoms in the aromatic ring, D, E and F are each substituents of C, D being a group of the formula --(O).sub.x --(R).sub.y --SiR1/3, E being a group of the formula --OR.sup.2, F being a group of the formula --R.sup.3, a being 1, 2, or 3, b being 0, 1 or 2, c being 0, 1 or 2, x being 0 or 1 and y being 0 or 1, and R, R.sup.1, R.sup.2 and R.sup.3 are as defined in claim 1; B is a group of the formula ##STR2## in which E and F, which are as defined above, may each be bound to the 2, 3, 4, 5 or 6 position in the benzene ring, d is 0, 1 or 2, e is 0, 1 or 2 and X.sup.- is a tosylate anion or a weakly nucleophilic or non-nucleophilic anion Y.sup.- selected from the group comprising CF.sub.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: November 21, 1995
    Assignee: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Silke Scheiding