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71. 发明授权

US06248507B1 Composite silver halide grains with improved reciprocity and process for their preparation 失效
标题翻译：具有改进的互易性的复合卤化银颗粒及其制备方法
公开(公告)号：US06248507B1
公开(公告)日：2001-06-19
申请号：US09475839
申请日：1999-12-30
申请人： Jerzy A. Budz , Seshadri Jagannathan , Alan R. Sadler
发明人： Jerzy A. Budz , Seshadri Jagannathan , Alan R. Sadler
IPC分类号： G03C1005
CPC分类号： G03C1/015 , G03C1/035 , G03C1/09 , G03C5/04 , G03C2001/03535 , G03C2001/03541 , G03C2001/03552 , G03C2001/093 , G03C2200/39
摘要： A process for the preparation of a radiation-sensitive silver halide emulsion comprised of high chloride cubical host grains containing from 0.05 to 3 mole percent iodide, based on total silver, and epitaxially deposited silver bromide, where the iodide is incorporated in the host grains in a controlled, non-uniform distribution forming a core containing at least 50 percent of total silver, an iodide free surface shell having a thickness of greater than 50 Å, and a sub-surface shell that contains a maximum iodide concentration is disclosed, the process comprising: (a) providing in a stirred reaction vessel a dispersing medium and high chloride silver halide cubical grains which form the high chloride host grain cores, (b) adding fine silver iodide grains to the reaction vessel and ripening out the fine silver iodide grains to form the sub-surface shells that contain a maximum iodide concentration, (c) precipitating silver chloride onto the sub-surface shells to form an iodide free surface shell, and (d) depositing silver bromide in an amount of from 0.05 to 5 mole percent, based on total silver, on the host grain surfaces in the presence of an iridium dopant. Also disclosed are photographic recording elements comprising a support and at least one light sensitive silver halide emulsion layer comprising silver halide grains prepared as described above, and an electronic printing method which comprises subjecting a radiation sensitive silver halide emulsion layer of a recording element to actinic radiation of at least 10−4 ergs/cm2 for up to 100&mgr; seconds duration in a pixel-by-pixel mode, wherein the silver halide emulsion layer is comprised of silver halide grains prepared as described above.
摘要翻译：一种用于制备辐射敏感的卤化银乳剂的方法，其由高氯化物立方体主体颗粒组成，其含有基于总银的0.05至3摩尔％的碘化物和外延沉积的溴化银，其中将碘化物掺入主体颗粒中公开了一种控制的，不均匀的分布，形成包含总银的至少50％，厚度大于的无碘化物表面壳和含有最大碘化物浓度的亚表面壳的核心，该方法包括：（a）在搅拌的反应容器中提供形成高氯化物主体颗粒芯的分散介质和高氯化物卤化银立方晶粒，（b）向反应容器中加入细小的碘化银颗粒并熟化出碘化银细颗粒以形成含有最大碘化物浓度的亚表面壳，（c）将氯化银沉淀到次表面壳上以形成无碘化物并且（d）在铱掺杂剂的存在下，在主体颗粒表面上以基于总银的0.05至5摩尔％的量沉积溴化银。还公开了包含载体和包含如上所述制备的卤化银颗粒的至少一种感光卤化银乳剂层的照相记录元件和电子印刷方法，其包括使记录元件的辐射敏感卤化银乳剂层进行光化辐射至少10-4ergerg / cm2，以逐像素模式持续长达100mu秒，其中卤化银乳剂层由如上所述制备的卤化银颗粒组成。

72. 发明授权

US6165705A Photothermographic elements 失效
标题翻译：光热敏元件
公开(公告)号：US6165705A
公开(公告)日：2000-12-26
申请号：US216530
申请日：1998-12-18
申请人： Heidi E. Dankosh , Kathleen R. Gisser , Thomas N. Blanton , Dilip K. Chatterjee , Seshadri Jagannathan
发明人： Heidi E. Dankosh , Kathleen R. Gisser , Thomas N. Blanton , Dilip K. Chatterjee , Seshadri Jagannathan
IPC分类号： G03G5/00 , G03C1/498 , G03C1/00
CPC分类号： G03C1/49818
摘要： This invention comprises a photothermographic element comprising a support bearing an imaging layer comprising:a silver salt;a reducing agent;a binder; anda photosensitive material comprising silver iodide produced by dispersing a solid ionic conductor of the formula MAg.sub.4 I.sub.5 in an organic solvent, whereby the solid ionic conductor decomposes to produce silver iodide, and wherein M is a monovalent cation and said solid ionic conductor has an ionic conductivity of >0.001 ohm.sup.-1 cm.sup.-1 at 25.degree. C.
摘要翻译：本发明包括光热敏成像元件，其包含承载成像层的载体，该成像层包含：银盐; 还原剂; 粘合剂和通过将式MAg4I5的固体离子导体分散在有机溶剂中而产生的含有碘化银的感光材料，由此固体离子导体分解产生碘化银，其中M是一价阳离子，所述固体离子导体具有离子导电性在25℃下> 0.001欧姆 - 1厘米-1

73. 发明授权

US5723278A Tabular grain emulsions with selected site halide conversions and processes for their preparation 失效
标题翻译：具有选择的位点卤化物转化的片状颗粒乳剂及其制备方法
公开(公告)号：US5723278A
公开(公告)日：1998-03-03
申请号：US657827
申请日：1996-05-31
申请人： Seshadri Jagannathan , David E. Fenton , Samuel Chen
发明人： Seshadri Jagannathan , David E. Fenton , Samuel Chen
IPC分类号： G03C1/005 , G03C1/015 , G03C1/035
CPC分类号： G03C1/0051
摘要： A radiation-sensitive photographic emulsion is disclosed containing a gelatino-vehicle and tabular grains accounting for at least 70 percent of total grain projected area comprised of, prior to house conversion, at least 90 mole percent bromide and, after house conversion, up to 12 mole percent iodide, based on total silver, having {111} major faces that form corners joined by linear edges, and containing halide conversion dislocations that are confined to corner regions. Superior performance and selected site halide conversion can be realized by maintaining a pBr of less than 3.5 and by employing for halide conversion an iodide ion source exhibiting a second order reaction rate constant with the gelatino-vehicle of less than 10.sup.-3 mole.sup.-1 sec.sup.-1.
摘要翻译：公开了一种辐射敏感的感光乳剂，其包含明胶载体和片状颗粒，其占总颗粒预计面积的至少70％，其在房屋转化之前包含至少90摩尔百分比的溴化物，并且在房屋转化后，最多12 基于总银的碘化物百分比，具有{111}主面，其形成通过线性边缘连接的角，并且包含被限制在拐角区域的卤化物转化位错。可以通过保持小于3.5的pBr并且通过使用表现出二级反应速率常数的碘离子源，其中明胶载体低于10-3摩尔-1秒的碘离子源来实现优异的性能和选择的位置卤化物转化 -1。

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