Patents by Inventor Volker Reiffenrath
Volker Reiffenrath 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).
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Patent number: 11667840Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.Type: GrantFiled: October 23, 2017Date of Patent: June 6, 2023Assignee: Merck Patent GmbHInventors: Atsutaka Manabe, Christian Jasper, Volker Reiffenrath, Constanze Brocke, Detlef Pauluth, Dagmar Klass, Michael Wittek, Renate Seeger, Dmitry Ushakov, Beate Schneider
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Patent number: 11542433Abstract: The invention relates to compounds of the formula I, in which R, A, n, L1, L2, L3 and X have the meanings given in Claim 1, to a process for their preparation, and to liquid-crystalline media comprising at least one compound of the formula I and electro-optical displays containing a liquid-crystalline medium of this type.Type: GrantFiled: July 17, 2017Date of Patent: January 3, 2023Assignee: MERCK PATENT GMBHInventors: Lars Lietzau, Volker Reiffenrath, Mark Goebel
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Patent number: 11441073Abstract: The invention relates to a liquid-crystalline medium which comprises at least one compound of the formula I, wherein the radicals R11, L1, L2, n and A are as defined herein, and to the use thereof for an active-matrix display, in particular based on the VA, PSA, PS-VA, PA-VA, PALC, FFS, PS-FFS, IPS or PS-IPS effect.Type: GrantFiled: August 21, 2015Date of Patent: September 13, 2022Assignee: MERCK PATENT GMBHInventors: Harald Hirschmann, Martina Windhorst, Monika Bauer, Volker Reiffenrath, Matthias Bremer
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Patent number: 11208594Abstract: Liquid-crystalline media comprising one or more compounds of formula G and one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters have the meaning indicated in claim 1, and components comprising these media, are suitable for use in high-frequency technology, in particular, in phase shifters and microwave array antennas.Type: GrantFiled: December 14, 2015Date of Patent: December 28, 2021Assignee: Merck Patent GmbHInventors: Michael Wittek, Constanze Brocke, Volker Reiffenrath
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Publication number: 20210371749Abstract: The invention relates to compounds of the formula I, in which R, A, n, L1, L2, L3 and X have the meanings given in Claim 1, to a process for their preparation, and to liquid-crystalline media comprising at least one compound of the formula I and electro-optical displays containing a liquid-crystalline medium of this type.Type: ApplicationFiled: July 17, 2017Publication date: December 2, 2021Applicant: MERCK PATENT GMBHInventors: Lars LIETZAU, Volker REIFFENRATH, Mark GOEBEL
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Publication number: 20210284911Abstract: An electro-optical display element in the areas of displays for watches, pocket calculators, large display panels as used in railway stations, airports and sports arenas, displays of portable or desktop computers, navigation systems and video applications, which upon the application of a voltage to the display element achieves that the longitudinal axis of molecules in a liquid-crystalline media orients itself in such a way that the larger of the dielectric constants becomes effective, which electro-optical display element contains two plates of a capacitor.Type: ApplicationFiled: February 5, 2021Publication date: September 16, 2021Applicant: Merck Patent GmbHInventors: Volker Reiffenrath, Matthias Bremer, Rocco Fortte, Harald Hirschmann, Martin Engel
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Publication number: 20210087469Abstract: The invention relates to a liquid-crystalline medium comprising at least one compound of the formula I, in which R1 has the meanings indicated in Claim 1, and to the use thereof in liquid-crystalline media and in electro-optical liquid-crystal displays.Type: ApplicationFiled: December 4, 2020Publication date: March 25, 2021Inventors: Mark GOEBEL, Harald HIRSCHMANN, Lars LIETZAU, Volker REIFFENRATH, Sabine SCHOEN, Brigitte SCHULER
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Publication number: 20200291298Abstract: Disclosed are a liquid-crystalline medium which contains at least one compound of formula IA, and in addition at least one compound of formula CC-n-V and/or CC-V-V1, where the percentage proportion of the compound(s) of formula IA is greater than or equal to the percentage proportion of CC-n-V, and/or the percentage proportion of the compound(s) of formula IA is greater than the percentage proportion of CC-V-V1, where the percentage proportion is based on the liquid-crystalline medium, and the use thereof in active-matrix displays, in particular based on the VA, PSA, PVA, PS-VA, SS-VA, SA-VA, PA-VA, PALC, FFS, PS-FFS, PS-IPS or IPS effect.Type: ApplicationFiled: June 2, 2020Publication date: September 17, 2020Applicant: MERCK PATENT GMBHInventors: Harald HIRSCHMANN, Martina WINDHORST, Volker REIFFENRATH
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Patent number: 10738243Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I, and one or more compounds selected from the group of the compounds of the formulae II and III and/or IV, in which the parameters have the respective meanings indicated in the specification, and optionally one or more further dielectrically positive compounds and optionally one or more further dielectrically neutral compounds, and to liquid-crystal displays, especially active-matrix displays and in particular TN, IPS and FFS displays, containing these media.Type: GrantFiled: July 5, 2016Date of Patent: August 11, 2020Assignee: MERCK PATENT GMBHInventors: Michael Junge, Volker Reiffenrath, Elvira Montenegro, Michael Wittek, Markus Czanta
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Patent number: 10711195Abstract: The present invention relates to liquid crystal mixtures comprising one or more compounds of the formula A and, in addition one or more compounds of formula I or one or more compounds of formula II wherein the individual radicals have the respective meanings indicated in claim 1, to the use thereof for high-frequency components, and to high-frequency components, in particular antennae, especially for the gigahertz range, comprising these media.Type: GrantFiled: March 22, 2017Date of Patent: July 14, 2020Assignee: Merck Patent GmbHInventors: Atsutaka Manabe, Christian Jasper, Volker Reiffenrath, Constanze Brocke, Detlef Pauluth, Dagmar Klass, Renate Seeger
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Patent number: 10711197Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters R1-R3, Z21, Z31, Z32 and rings A11, A12, A13, A21, A22, A31, and A32 are as defined herein, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.Type: GrantFiled: January 26, 2017Date of Patent: July 14, 2020Assignee: MERCK PATENT GMBHInventors: Michael Wittek, Dagmar Klass, Atsutaka Manabe, Christian Jasper, Volker Reiffenrath, Constanze Brocke, Detlef Pauluth
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Patent number: 10472569Abstract: The invention relates to a liquid-crystalline medium comprising at least one compound of the formula I, in which R1 and R2 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.Type: GrantFiled: October 23, 2013Date of Patent: November 12, 2019Assignee: Merck Patent GmbHInventors: Harald Hirschmann, Volker Reiffenrath
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Publication number: 20190330530Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.Type: ApplicationFiled: October 23, 2017Publication date: October 31, 2019Applicant: Merck Patent GmbHInventors: Atsutaka MANABE, Christian JASPER, Volker REIFFENRATH, Constanze BROCKE, Detlef PAULUTH, Dagmar KLASS, Michael WITTEK, Renate SEEGER, Dmitry USHAKOV, Beate SCHNEIDER
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Patent number: 10450509Abstract: Mesogenic media comprising one or more compounds of formulae I or II preferably mesogenic media showing a blue phase, preferably stabilized by a polymer, and their use in electro-optical light modulation elements and their respective use in displays, as well as such devices.Type: GrantFiled: May 9, 2012Date of Patent: October 22, 2019Assignee: MERCK PATENT GMBHInventors: Michael Wittek, Norihiko Tanaka, Malgorzata Rillich, Volker Reiffenrath, Axel Jansen
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Patent number: 10442990Abstract: A liquid-crystal medium having a component A which is one or more compounds of the formula IA and corresponding, novel mesogenic compounds and the preparation thereof. These liquid-crystal media, are used in components for high-frequency technology, and to components of this type which contain the media. The components are suitable, in particular, for phase shifters in the microwave and millimeter wave region, for microwave and millimeter wave array antennae and very particularly for so-called tunable “reflectarrays”.Type: GrantFiled: February 27, 2012Date of Patent: October 15, 2019Assignee: Merck Patent GmbHInventors: Christian Jasper, Elvira Montenegro, Detlef Pauluth, Volker Reiffenrath, Atsutaka Manabe
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Publication number: 20190309225Abstract: The invention relates to dielectrically positive liquid crystalline media comprising a compound of formula I wherein R1 denotes alkenyl having 2 to 12 C atoms, and X1 denotes H, F or alkyl having 1 to 6 C atoms, and to liquid crystal displays comprising these media, especially to active matrix displays and in particular to TN, FFS and IPS mode displays.Type: ApplicationFiled: December 6, 2017Publication date: October 10, 2019Applicant: Merck Patent GmbHInventors: Michael WITTEK, Volker REIFFENRATH
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Patent number: 10364392Abstract: A liquid-crystalline medium having a nematic phase, a dielectric anisotropy of 0.5 or more and a ratio of the dielectric constant perpendicular to the director (??) to the dielectric anisotropy (??), i.e. (??/??), of 2.0 or less and comprises one or more compounds of formula I: wherein the parameters have the meaning given in the text. An electro-optical display containing such a medium, particularly in an active-matrix display based on the IPS or FFS effect. Methods for using of the compounds of formula I for improvement of the transmission and/or response times of a liquid-crystalline medium which comprises one or more additional mesogenic compounds.Type: GrantFiled: May 23, 2016Date of Patent: July 30, 2019Assignee: MERCK PATENT GMBHInventors: Atsutaka Manabe, Volker Reiffenrath, Brigitte Schuler
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Publication number: 20190100695Abstract: The present invention relates to liquid crystal mixtures comprising one or more compounds of the formula A and, in addition one or more compounds of formula I or one or more compounds of formula II wherein the individual radicals have the respective meanings indicated in claim 1, to the use thereof for high-frequency components, and to high-frequency components, in particular antennae, especially for the gigahertz range, comprising these media.Type: ApplicationFiled: March 22, 2017Publication date: April 4, 2019Applicant: Merck Patent GmbHInventors: Atsutaka MANABE, Christian JASPER, Volker REIFFENRATH, Constanze BROCKE, Detlef PAULUTH, Dagmar KLASS, Renate SEEGER
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Patent number: 10099975Abstract: Compounds of formula I their use in liquid-crystalline media, for example, for the phase shifting of microwaves for tunable phased-array antennae, and their use for high-frequency components, in particular antennae, especially for the gigahertz range.Type: GrantFiled: August 11, 2014Date of Patent: October 16, 2018Assignee: MERCK PATENT GMBHInventors: Christian Jasper, Constanze Brocke, Detlef Pauluth, Volker Reiffenrath, Atsutaka Manabe
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Patent number: 10081765Abstract: The invention relates to a liquid-crystalline medium comprising at least one compound of the formula I, in which R1 and R2 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.Type: GrantFiled: February 22, 2016Date of Patent: September 25, 2018Assignee: MERCK PATENT GMBHInventors: Harald Hirschmann, Volker Reiffenrath