Patents by Inventor Ewgenij Wakaresko

Ewgenij Wakaresko 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).

  • LIQUID-CRYSTAL MEDIUM
    Publication number: 20210222067
    Abstract: The invention relates to a liquid-crystalline medium, in particular based on a mixture of polar compounds, and to the use thereof for an active-matrix display, in particular based on the VA, SA-VA, IPS, PS-IPS, FFS, PS-FFS, UB-FFS or PS-UB-FFS effect.
    Type: Application
    Filed: January 6, 2021
    Publication date: July 22, 2021
    Applicant: MERCK PATENT GMBH
    Inventors: Harald HIRSCHMANN, Ewgenij WAKARESKO
  • Method for the production of Praziquantel and precursors thereof
    Patent number: 9932337
    Abstract: The present invention relates to methods for the production of enantiopure or enantioenriched Praziquantel precursors and to methods for the production of enantiopure or enantioenriched Praziquantel comprising the methods for the production of the Praziquantel precursors. The present invention further relates to compounds or intermediates useful in such methods.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: April 3, 2018
    Assignee: Merck Patent GmbH
    Inventors: David Maillard, Andreas Waechtler, Jeremy Maurin, Ewgenij Wakaresko, Christian Jasper
  • Method For The Production of Praziquantel and Precursors Thereof
    Publication number: 20170320873
    Abstract: The present invention relates to methods for the production of enantiopure or enantioenriched Praziquantel precursors and to methods for the production of enantiopure or enantioenriched Praziquantel comprising the methods for the production of the Praziquantel precursors. The present invention further relates to compounds or intermediates useful in such methods.
    Type: Application
    Filed: November 19, 2015
    Publication date: November 9, 2017
    Applicant: Merck Patent GmbH
    Inventors: David MAILLARD, Andreas WAECHTLER, Jeremy MAURIN, Ewgenij WAKARESKO, Christian JASPER
  • Process of isolating enantiomer components from enantiomer mixtures by particle-size-controlled crystallization
    Patent number: 8846911
    Abstract: The present invention discloses a process for isolating enantiomer components from a mixture of enantiomers through particle-size-controlled crystallization, comprising the steps of: (a) forming a solution of a mixture of enantiomers (R) and (S) in a solvent in the absence of any further additives or agents; (b) seeding the solution of step (a) simultaneously or consecutively with seed crystals of enantiomer (R) and with seed crystals of enantiomer (S), wherein the seed crystals of enantiomer (R) differ in size and/or in quantity from the seed crystals of enantiomer (S) to allow separation of the crystals composed of a mixture enriched with enantiomer (R) from the crystals composed of a mixture enriched with enantiomer (S); (c) inducing simultaneous crystallization of enantiomer (R) and enantiomer (S); and (d) isolating crystals composed of a mixture enriched with enantiomer (R) from crystals composed of a mixture enriched with enantiomer (S) through size separation of the crystals, preferably through sieving
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: September 30, 2014
    Assignee: Poxel
    Inventors: David Maillard, Guntram Koller, Ewgenij Wakaresko, Sabine Gottburg-Reininger
  • PROCESS OF ISOLATING ENANTIOMER COMPONENTS FROM ENANTIOMER MIXTURES BY PARTICLE-SIZE-CONTROLLED CRYSTALLIZATION
    Publication number: 20130345421
    Abstract: The present invention discloses a process for isolating enantiomer components from a mixture of enantiomers through particle-size-controlled crystallization, comprising the steps of: (a) forming a solution of a mixture of enantiomers (R) and (S) in a solvent in the absence of any further additives or agents; (b) seeding the solution of step (a) simultaneously or consecutively with seed crystals of enantiomer (R) and with seed crystals of enantiomer (S), wherein the seed crystals of enantiomer (R) differ in size and/or in quantity from the seed crystals of enantiomer (S) to allow separation of the crystals composed of a mixture enriched with enantiomer (R) from the crystals composed of a mixture enriched with enantiomer (S); (c) inducing simultaneous crystallization of enantiomer (R) and enantiomer (S); and (d) isolating crystals composed of a mixture enriched with enantiomer (R) from crystals composed of a mixture enriched with enantiomer (S) through size separation of the crystals, preferably through sieving
    Type: Application
    Filed: August 26, 2013
    Publication date: December 26, 2013
    Inventors: David MAILLARD, Guntram KOLLER, Ewgenij WAKARESKO, Sabine GOTTBURG-REININGER
  • PROCESS OF ISOLATING ENANTIOMER COMPONENT FROM ENANTIOMER MIXTURES BY PARTICLE-SIZE-CONTROLLED CRYSTALLIZATION
    Publication number: 20110184169
    Abstract: The present invention discloses a process for isolating enantiomer components from a mixture of enantiomers through particle-size-controlled crystallization, comprising the steps of: (a) forming a solution of a mixture of enantiomers (R) and (S) in a solvent in the absence of any further additives or agents; (b) seeding the solution of step (a) simultaneously or consecutively with seed crystals of enantiomer (R) and with seed crystals of enantiomer (S), wherein the seed crystals of enantiomer (R) differ in size and/or in quantity from the seed crystals of enantiomer (S) to allow separation of the crystals composed of a mixture enriched with enantiomer (R) from the crystals composed of a mixture enriched with enantiomer (S); (c) inducing simultaneous crystallization of enantiomer (R) and enantiomer (S); and (d) isolating crystals composed of a mixture enriched with enantiomer (R) from crystals composed of a mixture enriched with enantiomer (S) through size separation of the crystals, preferably through sieving
    Type: Application
    Filed: July 28, 2009
    Publication date: July 28, 2011
    Inventors: David Maillard, Guntram Koller, Ewgenij Wakaresko, Sabine Gottburg-Reininger