Patents by Inventor Klaus Delpy

Klaus Delpy 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 preparation of diacylimides
    Patent number: 6028192
    Abstract: The present invention relates to a process for the preparation of compounds of the formula 1 ##STR1## by reacting a secondary acid amide of the formula 2 ##STR2## with an acid chloride of the formula 3 ##STR3## in the presence of N,N-diisopropyl-N-ethylamine. R.sup.1, R.sup.2 and R.sup.3 are alkyl or alkenyl radicals, if required also aryl radicals. The compounds of the formula 1 are suitable for use as insecticides or bleach activators.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: February 22, 2000
    Assignee: Clariant GmbH
    Inventors: Johannes Becherer, Klaus Delpy, Karl-Heinz Keil, Bernhard Mees
  • Process for preparing N-alkylcarbazoles
    Patent number: 5902884
    Abstract: Process for preparing N-alkylcarbazolesThe present invention relates to a process for preparing N-alkylcarbazoles of the formula I ##STR1## where R.sup.1 is (C.sub.1 -C.sub.6)-alkyl andY is hydrogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy, nitro or halogen, by reacting a carbazole of the formula II ##STR2## with an alkyl halide of the formula IIIR.sup.1 -X IIIwhere X is a halogen atom,in an inert solvent in the presence of an inorganic base and a catalyst of the formula IVR.sup.2 R.sup.3 N-(CH.sub.2).sub.n -NR.sup.4 R.sup.5 IVwheren is an integer from 2 to 8,R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, hydrogen or (C.sub.1 -C.sub.4)-alkyl andR.sup.5 is hydrogen, (C.sub.1 -C.sub.4)-alkyl, amino-(C.sub.1 -C.sub.4)-alkyl or N,N-di(C.sub.1 -C.sub.4)-alkylamino-(C.sub.1 -C.sub.4)-alkyl.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: May 11, 1999
    Assignee: Clariant GmbH
    Inventors: Wolfgang Bauer, Klaus Delpy, Gert Nagl, Leonhard Unverdorben
  • Process for the oxidation of polyarlene compounds containing thioether groups
    Patent number: 5891988
    Abstract: The process for the preparation of polyarylene sulfones by oxidation of polyarylene sulfides with an oxidizing agent in the presence of a liquid is carried out under reduced pressure so that the liquid boils. The reaction temperature can easily be kept constant in the process.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: April 6, 1999
    Assignee: Ticona GmbH
    Inventors: Helmut Scheckenbach, Klaus Delpy, Stefan Disch
  • Process for the preparation of ether-sulphonates
    Patent number: 5523471
    Abstract: The present invention relates to a process for the preparation of ether-sulphonates of high purity, substantially free from extraneous salts, of the general formula IR.sup.1 --[O--(CR.sup.2 R.sup.2 R.sup.2' --CR.sup.5 R.sup.5' SO.sub.3 MIin whichR.sup.2 to R.sup.5, R.sup.2+ to R.sup.5', M, x and y are defined as given in claim 1 by reacting a compound of the general formula IIR.sup.1 --[O--(CR.sup.2 R.sup.2+ --CR.sup.3 R.sup.3').sub.x ].sub.y --OHIIwith a compound of the general formula IIIHO--CR.sup.4 R.sup.4' CR.sup.5 R.sup.5' --SO.sub.3 M IIIin the presence of a compound of the general formula IVMOH IVfollowed by neutralization of the compound of the general formula IV with an acid, characterized in that the acid employed is a compound of the general formula VR.sup.1 --[O--(CR.sup.2 R.sup.2' --CR.sup.3 R.sup.3').sub.x ].sub.y --OCR.sup.4 R.sup.4' CR.sup.5 R.sup.5' SO.sub.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: June 4, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Klaus Delpy, Fritz Engelhardt, Ralf Zerrer, Dirk Buhring
  • Process for the preparation of hydroxyalkylaminonitrobenzene derivatives
    Patent number: 5508467
    Abstract: The present invention relates to a process for the preparation of compounds of the general formula I ##STR1## by reaction of compounds of the general formula II ##STR2## with compounds of the general formula III ##STR3## in inert aprotic solvents in the presence of a base and subsequent rearrangement of the resulting intermediate compound with an alkali metal hydroxide, characterized in that the intermediate compound is not isolated.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: April 16, 1996
    Assignee: Cassella Aktiengesellschaft
    Inventors: Wolfgang Bauer, Klaus Delpy, Andreas Bittner
  • Process for the preparation of pyrrole derivates
    Patent number: 5290947
    Abstract: The present invention relates to a process for the preparation of pyrrole derivatives of the general formula I ##STR1## by reaction of a compound of the general formula III ##STR2## where R, R.sup.1 and R.sup.2 are defined as specified in claim 1, in a Vilsmeier reaction. The reaction is carried out in an easily degradable solvent, the reaction product is isolated with the aid of a water-miscible extractant and is purified by high-vacuum distillation in the short path evaporator.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: March 1, 1994
    Assignee: Cassella Aktiengesellschaft
    Inventors: Gerhard Zoller, Eckard Kujath, Klaus Delpy, Manfred Schrod