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    1:1 Adducts of indole and (na)phthalaldehydic acid
    91.
    发明授权
    1:1 Adducts of indole and (na)phthalaldehydic acid 失效
    1：1吲哚和（na）邻苯二甲酸的加合物

    公开(公告)号：US4151174A

    公开(公告)日：1979-04-24

    申请号：US809058

    申请日：1977-06-22

    Applicant: Eva R. Karger ,  Paul T. MacGregor

    Inventor： Eva R. Karger ,  Paul T. MacGregor

    IPC: C09B11/04 ,  G03C8/48 ,  C07D209/04

    CPC classification number: G03C8/48 ,  C09B11/04

    Abstract: This invention relates to derivatives of phthalaldehydic and naphthalaldehydic acid useful as intermediates in the preparation of pH-sensitive phthalide and naphthalide indicator dyes.A class of intermediates provided by the present invention comprises compounds of the formula: ##STR1## wherein A represents 4'-hydroxy-1'-naphthyl; B represents 4'-hydroxy-1'-naphthyl or indol-3-yl and C represents a 2-carboxy-1-phenyl radical or an 8-carboxy-1-naphthyl radical and preferably is 8-carboxy-1-naphthyl.

    Bis-indolyl phthalides and naphthalides
    92.
    发明授权
    Bis-indolyl phthalides and naphthalides 失效
    双吲哚基苯酞和萘二甲酸酯

    公开(公告)号：US4124592A

    公开(公告)日：1978-11-07

    申请号：US409012

    申请日：1973-10-23

    Applicant: Stanley M. Bloom ,  Alan L. Borror ,  Paul S. Huyffer

    Inventor： Stanley M. Bloom ,  Alan L. Borror ,  Paul S. Huyffer

    IPC: C09B11/04 ,  C09B11/08 ,  C09B11/26 ,  C07D209/04 ,  C07D209/14 ,  C07D209/20

    CPC classification number: C09B11/08 ,  C09B11/04 ,  C09B11/26

    Abstract: This invention relates to indole phthalein indicator dyes including phthalides and naphthalides wherein one of the indol-3-yl radicals is substituted with a hydrogen-bonding group on a carbon atom adjacent to the nitrogen atom of the indole ring. In a preferred embodiment, one of the indol-3-yl radicals is substituted with a hydrogen-bonding group and the other indol-3-yl radical is substituted with a hydrogen-bonding group or with an electron-withdrawing group. These indicator dyes, especially those of the preferred embodiment, possess a relatively high pKa and a relatively broad absorption spectrum in the visible range.

    Abstract translation: 本发明涉及吲哚类酞指示剂染料，其包括苯并二氮杂萘和萘，其中吲哚-3-基之一与吲哚环的氮原子相邻的碳原子上的氢键基取代。 在优选的实施方案中，吲哚-3-基中的一个被氢键基团取代，另一个吲哚-3-基被氢键基团或吸电子基团取代。 这些指示剂染料，特别是优选实施方案的指示剂染料在可见光范围内具有相对高的pKa和相对较宽的吸收光谱。

    Process for preparing naphthalide indicator dyes
    93.
    发明授权
    Process for preparing naphthalide indicator dyes 失效
    制备萘二酸指示剂染发剂的方法

    公开(公告)号：US3816453A

    公开(公告)日：1974-06-11

    申请号：US20261571

    申请日：1971-11-26

    Applicant: POLAROID CORP

    Inventor： KARGER E ,  MACGREGOR P

    IPC: C09B11/04 ,  G03C8/48 ,  C07D27/56

    CPC classification number: G03C8/48 ,  C09B11/04

    Abstract: THIS INVENTION RELATES TO A METHOD OF SYNTHESIZING INDICATOR DYES BY REACTING A 1-NAPHTHOL AND A PHTHALALDEHYDIC OR A NAPHTHALADEHYDIC ACID TO FORM THE CORRESPONDING 1:1 ADDUCT, AND REACTING THE ADDUCT WITH A 1-NAPHTHOL OR AN INDOL TO FORM A LEUCO DYE INTERMEDIATE WHICH IS OXIDIZED TO THE CORRESPONDING INDICATOR DYE PRODUCT. IN A PREFERRED AMBODIMENT, 3,3-DISUBSTITUTED (NA)PHTHALIDES ARE PREPARED WHEREIN THE 3,3 SUBSTITUENTS COMPRISE CARBOXY-SUBSTITUTED NAPHTHOL RADICALS WHICH INCLUDES THE ADDITIONAL STEP OF IONIZING THE LEUCO DYE IMTERMEDIATE PRIOR TO THE OXIDATION STEP.

    Abstract translation: 本发明涉及邻苯二醛和萘甲酸的衍生物，其可用作制备pH敏感的苯酞和萘指示剂染料的中间体。

    Photographic diffusion-transfer processes and elements utilizing ph-sensitive optical filter agents to prevent fogging by extraneous actinic radiation during development
    94.
    发明授权
    Photographic diffusion-transfer processes and elements utilizing ph-sensitive optical filter agents to prevent fogging by extraneous actinic radiation during development 失效
    摄影扩散转移过程和元素利用敏感光学过滤器在发展过程中通过超临界辐射防止潮气

    公开(公告)号：US3702245A

    公开(公告)日：1972-11-07

    申请号：US3702245D

    申请日：1971-01-04

    Applicant: POLAROID CORP

    Inventor： SIMON MYRON S ,  WALLER DAVID P

    IPC: C09B11/04 ,  C09B11/08 ,  C09B11/24 ,  C09B11/26 ,  G03C8/48 ,  G03C5/54 ,  G03C1/40 ,  G03C7/00

    CPC classification number: G03C8/48 ,  C09B11/04 ,  C09B11/08 ,  C09B11/245 ,  C09B11/26

    Abstract: THIS INVENTION RELATES TO PHOTOGRAPHY, AND MORE PARTICULARLY, IT RELATES TO THE USE OF CERTAIN INDICATOR DYES DERIVED FROM PHENOLS AS OPTICAL FILTER AGENTS TO PROTECT A SELECTIVELY EXPOSED PHOTOSENSITIVE MATERIAL FROM POSTEXPOSURE FOGGING IN PHOTOGRAPHIC PROCESSES WHERE DEVELOPMENT OF THE PHOTOSENSITIVE MATERIAL IS CONDUCTED IN THE PRESENCE OF EXTRANEOUS INDIDENT LIGHT. THIS CLASS OF PHENOL INDICATOR DYES CONTAIN A RING-CLOSING MOIETY BONDED TO TWO HYDROXY-SUBSTITUTED CARBOCYCLIC ARYL RADICALS SELECTED FROM TWO P-HYDROXYPHENYL RADICALS EACH POSSESSING A HYDROGEN-BONDING GROUP ADJACENT TO THE P-HYDROXY GROUP AND TWO P-PHYDROXYNAPHTHYL RADICALS AT LEAST ONE OF THE P-HYDROXYNAPHTYL RADICALS POSSESSING A HYDROGENBONDING GROUP ADJACENT TO THE P-HYDROXY GROUP. AT A FIRST PH IN ALKALINE SOLUTION THEY HAVE A HIGHLY COLORED, LIGHTABSORBING FORM CAPABLE OF ABSORBING RADIATION WITHIN A PREDETERMINED WAVELENGTH RANGE IN THE LONGER WAVELENGTH REGION OF THE VISIBLE SPECTRUM AND AT A SECOND LESS ALKALINE PH HAVE A COLORLESS FORM THAT IS SUBSTANTIALLY NON-LIGHTABSORBING IN THE VISIBLE SPECTRUM. BY SELECTING A DYE FROM THIS CLASS WHICH IS IN ITS LIGHT-ASBORBING FORM AT THE PH AT WHICH DEVELOPMENT IS PREFORMED, PROTECTION OF THE EXPOSED PHOTOSENSITIVE MATERIAL FROM RADIATION ACTINIC THERETO IS AFFORDED WITHIN THE WAVELENGTH RANGE ABSORBED BY THE DYE AND SUBSEQUENT TO AT LEAST THE INITIAL STAGES OF DEVELOPMENT, THE DYE MAY BE RENDERED SUBSTANTIALLY COLORLESS BY ADJSTING THE PH TO PERMIT VIEWING OF THE FINAL IMAGE. IN A PREFERRED EMBODIMENT, THE PHENOL DYE OR DYES ARE USED IN CONJUNCTION WITH A SECOND DYE OR DYES HAVING A PRINCIPAL ABSORPTION IN AT LEAST A PARTIALLY DIFFERENT WAVELENGTH RANGE, AND THE PHENOL DYE(S) AND SECOND DYE(S) TOGETHER AFFORD PROTECTION OVER THE WAVELENGTH RANGE OF ABOUT 400 MM. TO 700 MM.

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