Patents by Inventor Udo Weigand

Udo Weigand 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: 10647852
    Abstract: The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: May 12, 2020
    Assignee: RODENSTOCK GMBH
    Inventors: Udo Weigand, Herbert Zinner
  • Publication number: 20190284397
    Abstract: The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.
    Type: Application
    Filed: May 23, 2017
    Publication date: September 19, 2019
    Inventors: Udo WEIGAND, Herbert ZINNER
  • Patent number: 10077274
    Abstract: The present invention relates to UV-curing-compatible photochromic single- or double-fused naphthopyrans of the general formulae (I) or (II) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by their excellent UV-curing compatibility, i.e. they remain undamaged—incorporated, for example, in an acrylate monomer matrix with UV initiator—by a free-radical polymerization of the matrix initiated by strong UV light. The photochromic dyes according to the invention, by means of suitable choice of substituents, are in addition characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having one discrete absorption band, can be replaced with a molecule of this type.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: September 18, 2018
    Assignee: RODENSTOCK GMBH
    Inventors: Udo Weigand, Herbert Zinner, Yven Rohlfing
  • Patent number: 9963574
    Abstract: The present invention relates to photochromic fluorenopyrans with defined dibenzo[b,d]pyrano fusion in accordance with general formulae (I) or (II) and to their use in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds of the invention are distinguished by two pronounced absorption bands of the open form in the visible wavelength range, meaning that with dye molecules of this kind it is possible to replace two conventional photochromic dyes each having only one discrete absorption band. The compounds of the invention, moreover, have a very good lifetime with very high performance.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: May 8, 2018
    Assignee: RODENSTOCK GMBH
    Inventors: Udo Weigand, Yven Rohlfing, Herbert Zinner
  • Publication number: 20160152629
    Abstract: The present invention relates to UV-curing-compatible photochromic single- or double-fused naphthopyrans of the general formulae (I) or (II) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by their excellent UV-curing compatibility, i.e. they remain undamaged—incorporated, for example, in an acrylate monomer matrix with UV initiator—by a free-radical polymerization of the matrix initiated by strong UV light. The photochromic dyes according to the invention, by means of suitable choice of substituents, are in addition characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having one discrete absorption band, can be replaced with a molecule of this type.
    Type: Application
    Filed: June 12, 2014
    Publication date: June 2, 2016
    Inventors: Udo WEIGAND, Herbert ZINNER, Yven ROHLFING
  • Patent number: 9151872
    Abstract: The present invention relates to photochromic double-fused naphthopyrans of the general formula (I) or (II) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having only one discrete absorption band, can be replaced with dye molecules of this type. The compounds according to the invention, moreover, have a very good lifetime with a very high performance.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: October 6, 2015
    Assignee: Rodenstock GmbH
    Inventors: Udo Weigand, Herbert Zinner, Yven Rohlfing
  • Publication number: 20150152246
    Abstract: The present invention relates to photochromic fluorenopyrans with defined dibenzo[b,d]pyrano fusion in accordance with general formulae (I) or (II) and to their use in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds of the invention are distinguished by two pronounced absorption bands of the open form in the visible wavelength range, meaning that with dye molecules of this kind it is possible to replace two conventional photochromic dyes each having only one discrete absorption band. The compounds of the invention, moreover, have a very good lifetime with very high performance.
    Type: Application
    Filed: July 11, 2013
    Publication date: June 4, 2015
    Inventors: Udo Weigand, Yven Rohlfing, Herbert Zinner
  • Patent number: 8987477
    Abstract: The present invention relates to photochromic double-indeno-fused naphthopyrans of the general formula (I) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having only one discrete absorption band, can be replaced with dye molecules of this type. The compounds according to the invention, moreover, have a very good lifetime with a very high performance.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: March 24, 2015
    Assignee: Rodenstock GmbH
    Inventors: Udo Weigand, Herbert Zinner, Yven Rohlfing
  • Patent number: 8933220
    Abstract: The present invention relates to photochromic fused naphthopyrans having a benzene ring which is adjacent to the pyran oxygen and is linked to the para substituent via both meta positions, and to the use thereof in plastics of all types, in particular for ophthalmic purposes.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: January 13, 2015
    Assignee: Rodenstock GmbH
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Publication number: 20140330028
    Abstract: The present invention relates to photochromic double-indeno-fused naphthopyrans of the general formula (I) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having only one discrete absorption band, can be replaced with dye molecules of this type. The compounds according to the invention, moreover, have a very good lifetime with a very high performance.
    Type: Application
    Filed: December 7, 2012
    Publication date: November 6, 2014
    Inventors: Udo Weigand, Herbert Zinner, Yven Rohlfing
  • Publication number: 20140235876
    Abstract: The present invention relates to photochromic double-fused naphthopyrans of the general formula (I) or (II) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having only one discrete absorption band, can be replaced with dye molecules of this type. The compounds according to the invention, moreover, have a very good lifetime with a very high performance.
    Type: Application
    Filed: September 26, 2012
    Publication date: August 21, 2014
    Inventors: Udo Weigand, Herbert Zinner, Yven Rohlfing
  • Publication number: 20130310556
    Abstract: The present invention relates to photochromic fused naphthopyrans having a benzene ring which is adjacent to the pyran oxygen and is linked to the para substituent via both meta positions, and to the use thereof in plastics of all types, in particular for ophthalmic purposes.
    Type: Application
    Filed: December 21, 2011
    Publication date: November 21, 2013
    Applicant: Rodenstock GMBH
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Patent number: 8486312
    Abstract: The present invention relates to photochromic naphthopyrancs having a double-bridged terphenyl sub-unit, and to the use thereof in plastics of all types, particularly for ophthalmic purposes.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: July 16, 2013
    Assignee: Rodenstock GmbH
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Patent number: 8236716
    Abstract: The present invention relates to photochromic benzopyranobenzopyrans with additional fusion and to the use thereof in plastics of all types, in particular for ophthalmic purposes. The compounds according to the invention are photochromic benzopyran compounds which can also be regarded as derived from 9-oxa-9,10-dihydrophenanthrene.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: August 7, 2012
    Assignee: Rodenstock GmbH
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Patent number: 8013174
    Abstract: Specific photochromic spirodihydrophenanthropyrans and their use in synthetic resin materials of all kinds, particularly for ophthalmic purposes. The compounds of the invention are photochromic pyran compounds derived from 9,10-dihydrophenanthrene in which at least one of the two carbon atoms at positions 9 and 10 belongs to a further ring system and thus forms a spiro linkage point.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: September 6, 2011
    Assignee: Rodenstock GmbH
    Inventors: Udo Weigand, Manfred Melzig, Yven Rohlfing
  • Publication number: 20110201489
    Abstract: The present invention relates to photochromic benzopyranobenzopyrans with additional fusion and to the use thereof in plastics of all types, in particular for ophthalmic purposes. The compounds according to the invention are photochromic benzopyran compounds which can also be regarded as derived from 9-oxa-9,10-dihydrophenanthrene.
    Type: Application
    Filed: August 8, 2008
    Publication date: August 18, 2011
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Patent number: 7922941
    Abstract: A photochromic plastic object which is composed of a transparent polymeric synthetic resin material, into or onto which at least one substantially mesoporous inorganic host structure is introduced or applied containing one or more embedded organic photochromic dye molecules so as to form a photochromic nanocomposite material. In contrast to prior techniques of adding or applying the photochromic organic dyes to the monomer mixture or prepolymer of a transparent synthetic resin material in a molecular form, in the photochromic plastic article of the present invention color is generated by using the photochromic nanocomposite particles or photochromic nanocomposite structures.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: April 12, 2011
    Assignee: Rodenstock GmbH
    Inventors: Yven Rohlfing, Udo Weigand, Manfred Melzig
  • Publication number: 20110081482
    Abstract: The present invention relates to photochromic naphthopyrancs having a double-bridged terphenyl sub-unit, and to the use thereof in plastics of all types, particularly for ophthalmic purposes.
    Type: Application
    Filed: April 29, 2009
    Publication date: April 7, 2011
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Patent number: 7892296
    Abstract: The present invention relates to photochromic benzopyrans and to the use thereof in plastics of all kinds, especially for ophthalmic purposes. The inventive compounds are photochromic benzopyran compounds in which a polycyclic aromatic is joined to the 5 and 6 positions of a benzopyran, where the bond in the 6 position is direct and the bond in the 5 position is via a mono- or diatomic bridge.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: February 22, 2011
    Assignee: Rodenstock GmbH
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand
  • Publication number: 20100243971
    Abstract: The present invention relates to photochromic benzopyrans and to the use thereof in plastics of all kinds, especially for ophthalmic purposes. The inventive compounds are photochromic benzopyran compounds in which a polycyclic aromatic is joined to the 5 and 6 positions of a benzopyran, where the bond in the 6 position is direct and the bond in the 5 position is via a mono- or diatomic bridge.
    Type: Application
    Filed: November 25, 2008
    Publication date: September 30, 2010
    Inventors: Manfred Melzig, Yven Rohlfing, Udo Weigand