Patents by Inventor Juergen Siewert

Juergen Siewert 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).

  • Publication number: 20230295066
    Abstract: The present invention relates to a process for the efficient, sustainable and gentle preparation of bio-based alkanediols, especially 1,2-alkanediols, at moderate temperatures based on a recycling of side products and non-reacted educts. The present invention also relates to a composition comprising at least two alkanediols obtainable by said process and to the use of said composition in consumer product formulations. In addition, the present invention relates to consumer products as such comprising the inventive composition.
    Type: Application
    Filed: December 9, 2021
    Publication date: September 21, 2023
    Inventors: Nikolas Bugdahn, Frank Struever, Heiko Heinemeyer, Moritz Hoppe, Juergen Siewert, Sabine Lange, Bernhard Russbueldt
  • Publication number: 20220064089
    Abstract: A process is proposed for producing 1,2-alkanediols in a solid dosing form, comprising or consisting of the following steps: (a) providing a melt of at least one 1,2-alkanediol; (b) cooling the melt from step (a) to a temperature below the melting point of the 1,2-alkanediol or of the 1,2-alkanediol mixture to obtain a prescratched melt consisting of a supercooled 1,2-alkanediol or a supercooled 1,2-alkanediol mixture having a content of 1,2-alkanediol seed crystals; (c) contacting the mixture from step (b) with a cooled surface to obtain 1,2-alkanediols or 1,2-alkanediol mixtures in crystalline form.
    Type: Application
    Filed: January 23, 2019
    Publication date: March 3, 2022
    Inventors: Jürgen SIEWERT, Torsten STEPHAN
  • Publication number: 20220054378
    Abstract: Suggested is a cosmetic or pharmaceutical or detergent composition comprising 1,2 pentanediol, wherein said 1,2-pentanediol is obtained from a process comprising the following steps: (a) providing at least one starting material selected from furfuryl alcohol and furfural; (b) reacting at least one of said starting materials with hydrogen in the presence of a heterogeneous catalyst to form 1,2-pentanediol, wherein said heterogeneous catalyst comprises: one or more metals selected from the group consisting of platinum, rhodium, ruthenium, nickel, palladium and iridium in metallic form and/or one or more compounds of metals selected from the group consisting of platinum, rhodium, ruthenium, nickel, palladium and iridium; and one or more support materials selected from the group consisting of activated carbon, aluminum oxide, silicon dioxide, and silicon carbide; and (c) removing the 1,2-pentanediol thus obtained from the reaction mixture.
    Type: Application
    Filed: October 30, 2018
    Publication date: February 24, 2022
    Inventors: Ravikumar PILLAI, Jürgen SIEWERT, Yonahha SANDER, Torsten STEPHAN, Christian WOLTER, Oliver LENZ
  • Publication number: 20210085579
    Abstract: Suggested are 1,2-alkanediols of formula (I) HOCH2—CH(OH)—R1 in which R1 stands for an alkyl radical having 3 to 10 carbon atoms, said diols being substantially free of lactones and/or peroxides.
    Type: Application
    Filed: August 9, 2017
    Publication date: March 25, 2021
    Inventors: Gerhard SCHMAUS, Jürgen SIEWERT, Sven WINKLER, Sabine LANGE, Torsten STEPHAN
  • Patent number: 10328405
    Abstract: Suggested is a process for the production of solid cooling agents, wherein a pre-scraped melt, i.e., a melt of menthol compounds with added seed crystals is applied to a pre-cooled area by even deposition of drops.
    Type: Grant
    Filed: July 26, 2015
    Date of Patent: June 25, 2019
    Assignee: Symrise AG
    Inventors: Jürgen Siewert, Michael Michler, Jörg Niekerken, Oliver Lenz, Christian Wolter
  • Publication number: 20170368521
    Abstract: The invention relates to a method for the storage of cooling agents without caking, characterized in that the latter are filled into standard packages having a maximum capacity of 25 l, with the proviso that (a) the packages are filled to 50% maximum, and (b) the amount filled into the package does not exceed 10 kg.
    Type: Application
    Filed: February 11, 2016
    Publication date: December 28, 2017
    Inventors: Oliver Lenz, Michael Michler, Jörg Niekerken, Jürgen Siewert, Christian Wolter
  • Publication number: 20170216802
    Abstract: Suggested is a process for the production of solid cooling agents, wherein a pre-scraped melt, i.e., a melt of menthol compounds with added seed crystals is applied to a pre-cooled area by even deposition of drops.
    Type: Application
    Filed: July 26, 2015
    Publication date: August 3, 2017
    Inventors: Jürgen Siewert, Michael Michler, Jörg Niederken, Oliver Lenz, Christian Wolter
  • Patent number: 9199900
    Abstract: A method for converting farnesol to nerolidol in the presence of alpha-bisabolol including providing or preparing a mixture of alpha-bisabolol, farnesol, and one or more catalysts for selective isomerization of farnesol to nerolidol in the presence of alpha-bisabolol, and converting at least a portion of the farnesol to nerolidol.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: December 1, 2015
    Assignee: Symrise AG
    Inventors: Jürgen Siewert, Burghard Wilkening
  • Publication number: 20130289317
    Abstract: A method for converting farnesol to nerolidol in the presence of alpha-bisabolol including providing or preparing a mixture of alpha-bisabolol, farnesol, and one or more catalysts for selective isomerization of farnesol to nerolidol in the presence of alpha-bisabolol, and converting at least a portion of the farnesol to nerolidol.
    Type: Application
    Filed: April 19, 2013
    Publication date: October 31, 2013
    Inventors: Jürgen Siewert, Burghard Wilkening