US A1 - Photochromic benzopyrans - Google
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Application number: US ,124; Other versions: US B2 (en; Inventor: Manfred Melzig: Yven Rohlfing: Udo Weigand; Current Assignee (The listed ... › patents
Cutting-Edge Photochromics Techniques - Document - Gale
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by J CARLTON · — Manfred Melzig, Ph.D., Head of Photochromics, Research and Development, Rodenstock Germany. * Don S. Nelson, Ph.D., Vice President, Research and Development ... › i.do
Rodenstock GmbH | Munich, Germany | - ResearchGate
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Manfred Melzig · Yven Rohlfing · Udo Weigand. The present invention relates to photochromic fused naphthopyrans having a benzene ring which is adjacent to ... › institution › Rodenstock-G...
[특허]Photochromic substituted naphthopyran compounds
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Claudia Mann DE; Manfred Melzig DE; Udo Weigand DE. Neutral-colored gray photochromic plastic object. USP Bojkova, Nina Vassileva; Graham, ... Claudia Mann DE; Manfred Melzig DE; Udo Weigand DE. Neutral-colored gray photochromic plastic object. USP Mainster,Martin A.; Lang,Alan J.; ... › srch › selectPORSrchPatent
CA C - Photochromic h-fused benzo[f]chromene derivatives...
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Rodenstock Gmbh, Manfred Melzig, Yven Rohlfing, Udo Weigand. Exporter la
citation ...
DE C Photochromic diaryl-naphthopyrans 3H Google...
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Other languages: German; Inventor: Manfred Melzig: Herbert Zinner; Current Assignee. The listed assignees may be inaccurate. Google has not performed a ...
US B2 - Substituted phenanthropyrans Google Patents
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The present invention relates to specific photochromic phenanthropyrans as well as to their use in synthetic resin materials of all types, especially for...
Melzig, DE - Patent applications
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, Photochromic Plastic Object - A photochromic plastic object which is composed of a transparent polymeric synthetic resin material, into or onto ...
Photochromic Plastic Object - Patent application
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BY-SA. Patent applications by Manfred Melzig, Wessling DE.
www.patentsencyclopedia.com › appPhotochromic Spirodihydrophenanthropyrans - Patent ...
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Patent application title: Photochromic Spirodihydrophenanthropyrans. Inventors: Udo Weigand (Muenchen, DE) Manfred Melzig (Wessling, DE) ...
US B2 - Photochromic fused naphthopyrans having a benzene ring...
patents.google.com
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...
US B2 - Naphthopyrans annelated in C5-C6 with a...
patents.google.com
US *, 29 apr 2009, 7 apr 2011, Manfred Melzig, Photochromic naphthopyrans having a double-bridged terphenyl sub-unit. DE A1,
CA C - Neutral-color gray photochromic plastic article...
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The present invention concerns a neutral-color gray photochromic plastic article which remains almost completely color-neutral or gray both during...
PHOTOCHROMIC FUSED NAPHTHOPYRANS HAVING A BENZENE RING WHICH IS...
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Inventors: Manfred Melzig (Wessling, DE) Yven Rohlfing (Munchen, DE) Udo Weigand (Munchen, DE) Assignees: RODENSTOCK GMBH
PHOTOCHROMIC NAPHTHOPYRANS HAVING A DOUBLE-BRIDGED TERPHENYL SUB-UNIT...
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Patent application title: PHOTOCHROMIC NAPHTHOPYRANS HAVING A DOUBLE-BRIDGED TERPHENYL SUB-UNIT Inventors: Manfred Melzig (Wessling, DE) Yven Rohlfing (Munich, DE) Udo Weigand ...
PHOTOCHROMIC BENZOPYRANO-BENZOPYRANS WITH FURTHER FUSING - Patent...
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Patent application title: PHOTOCHROMIC BENZOPYRANO-BENZOPYRANS WITH FURTHER FUSING Inventors: Manfred Melzig (Wessling, DE) Yven Rohlfing (Munich, DE) Udo Weigand (Munich, DE)
CA A1 - Photochromic h-fused benzo[f]chromene derivatives...
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The invention relates to specific photochromic h-annellated benzo[f]chrome-derivatives, in addition to the use thereof in all types of plastic, in...
CA C - Photochromic plastic object with permanently increased...
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Applicant, Optische Werke G. Rodenstock, Hans-Peter Sommer, Michael Vogt, Gerd-Peter Scherg, Manfred Melzig, Rodis Informationssysteme ...
CA A1 - High index curable photochromic composition and its...
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Applicant, Rodenstock Gmbh, Qiang Zheng, Donald Scott Nelson, Charles William Carper Jr., Manfred Melzig, Herbert Schuster, Herbert Zinner ...
www.google.com › patentsUS B1 - Photochromic naphthopyrans - Google Patents
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Application number: US ,921; Inventor: Manfred Melzig: Claudia Mann: Udo Weigand; Current Assignee (The listed assignees may be inaccurate. Google ...
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