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11. 发明授权

US5298385A High chloride folded tabular grain emulsions 失效
标题翻译：高氯化物折叠片状颗粒乳剂
公开(公告)号：US5298385A
公开(公告)日：1994-03-29
申请号：US60945
申请日：1993-05-12
申请人： Yun C. Chang , Donna J. McPhillips
发明人： Yun C. Chang , Donna J. McPhillips
IPC分类号： G03C1/015 , G03C1/005 , G03C1/035 , G03C1/07
CPC分类号： G03C1/0053 , G03C1/07 , G03C1/035 , G03C2200/44
摘要： A process is disclosed of preparing an emulsion comprised of dispersing medium and folded tabular grains containing at least 95 mole percent chloride, based on total silver. This is achieved by maintaining a chloride ion concentration of at least 0.5 molar in the dispersing medium while the grain nuclei are being formed and during grain growth maintaining in the dispersing medium a pH in the range of from 1 to 8 and an effective concentration of 2-hydroaminoazine or xanthinoid morphological modifier in the range of from a 5.times.10.sup.-5 to 2.times.10.sup.-2 millimolar concentration.
摘要翻译：公开了一种制备乳液的方法，该乳液由基于总银的至少95摩尔％氯化物的分散介质和折叠片状颗粒组成。这是通过在形成晶粒核的同时在分散介质中保持至少0.5摩尔的氯离子浓度并且在晶粒生长期间保持分散介质中的pH在1至8的范围内并且有效浓度为2 5-羟基丙嗪或黄素类化合物修饰剂，其浓度范围为5 * 10-5至2 * 10-2毫摩尔浓度。

12. 发明授权

US5250408A Chloride containing tabular grains with holes and process for their preparation 失效
标题翻译：含有含孔的氯化物片状颗粒及其制备方法
公开(公告)号：US5250408A
公开(公告)日：1993-10-05
申请号：US898612
申请日：1992-06-15
申请人： Yun C. Chang , Joe E. Maskasky
发明人： Yun C. Chang , Joe E. Maskasky
IPC分类号： G03C1/015 , G03C1/005 , G03C1/035 , G03C1/06 , G03C1/07
CPC分类号： G03C1/0053 , G03C1/015 , G03C1/07 , G03C2001/0055 , G03C2001/0156 , G03C2001/03511 , G03C2001/03535 , G03C2200/03 , G03C2200/43
摘要： The present invention is directed to a process of precipitating, for use in photography, a high aspect ratio silver halide tabular grain emulsion employing a dispersing medium and silver chlorobromide or silver chlorobromoiodide grains, wherein at least 50 percent of the tabular silver halide grains have a centrally located hole.

13. 发明授权

US06593073B1 Core/shell emulsions with enhanced photographic response 失效
标题翻译：具有增强的摄影反应的核/壳乳液
公开(公告)号：US06593073B1
公开(公告)日：2003-07-15
申请号：US09467613
申请日：1999-12-20
申请人： Jon N. Eikenberry , Yun C. Chang
发明人： Jon N. Eikenberry , Yun C. Chang
IPC分类号： G03C1005
CPC分类号： G03C1/10 , G03C1/035 , G03C1/12 , G03C7/3022 , G03C2001/03535 , G03C2001/03558 , G03C2200/24
摘要： A silver halide photographic element comprises at least one silver halide emulsion layer comprising a silver halide emulsion comprising core/shell silver halide grains wherein the core region comprises silver bromide with from about 5 to about 20% silver iodide and the shell region comprises silver bromide with about 0.1 to about 10% silver iodide and said layer contains a fragmentable electron donor compound of the formula X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein X is an electron donor moiety, Y′ is a leaving proton H or a leaving group Y, with the proviso that if Y′ is a proton, a base, &bgr;−, is covalently linked directly or indirectly to X, and wherein: 1) X—Y′ has an oxidation potential between 0 and about 1.4 V; and 2) the oxidized form of X—Y′ undergoes a bond cleavage reaction to give the radical X• and the leaving fragment Y′; and, optionally, 3) the radical X• has an oxidation potential≦−0.7V.
摘要翻译：卤化银照相元件包括至少一种卤化银乳剂层，其包含卤化银乳剂，其包含核/壳卤化银颗粒，其中芯区域包含溴化银和约5至约20％的碘化银，并且壳区域包含溴化银，约0.1至约10％的碘化银，并且所述层含有式XY'的可裂解电子给体化合物或含有式-X-Y'部分的化合物;其中X为电子给体部分，Y'为离去质子H或离去基团Y，条件是如果Y'是质子，则碱，β - 与X直接或间接共价连接，并且其中：1）XY'具有介于0和约1.4之间的氧化电位 V; 和2）X-Y'的氧化形式经历键断裂反应，得到基团X和离去片段Y';和任选地3）基团X的氧化势<= -0.7V。

14. 发明授权

US5908739A Simplified nucleation of high chloride <100> tabular grain emulsions 失效
标题翻译：高氯化物<100>片状颗粒乳剂的简化成核
公开(公告)号：US5908739A
公开(公告)日：1999-06-01
申请号：US975906
申请日：1997-11-21
申请人： Yun C. Chang , Samuel Chen
发明人： Yun C. Chang , Samuel Chen
IPC分类号： G03C1/015 , G03C1/005 , G03C1/035
CPC分类号： G03C1/0053
摘要： A high chloride {100} tabular grain emulsion is prepared by creating grain nuclei containing greater than 45 mole percent bromide. Growth onto the grains under conditions favorable for high chloride {100} grain growth is conducted while maintaining (a) a temperature in the range of from 25 to 85.degree. C., (b) a pH in the range of from 3.5 to 8.5, and (c) a vAg in the range of from 120 to 200 mV. Crystal lattice field distortions are observed at the nucleation site, and the nucleation site exhibits the maximum bromide concentration, which is greater than 5 mole percent, based on silver at the site.
摘要翻译：通过产生含有大于45摩尔％溴化物的晶粒核制备高氯化物{100}片状颗粒乳剂。在有利于高氯化物{100}晶粒生长的条件下在晶粒上生长进行，同时保持（a）温度在25至85℃，（b）pH在3.5至8.5的范围内，和（c）在120至200mV范围内的vAg。在成核位点观察到晶格场畸变，并且成核位点表现出最大的溴化物浓度，其大于5摩尔％，基于现场的银。

15. 发明授权

US5744297A High chloride (100) tabular grain emulsions containing large, thin tabular grains 失效
标题翻译：含有大的薄片状颗粒的高氯化物（100）片状颗粒乳剂
公开(公告)号：US5744297A
公开(公告)日：1998-04-28
申请号：US814209
申请日：1997-03-11
申请人： Yun C. Chang , Rajesh V. Mehta , Lois A. Buitano
发明人： Yun C. Chang , Rajesh V. Mehta , Lois A. Buitano
IPC分类号： G03C1/005 , G03C1/07 , G03C1/035
CPC分类号： G03C1/0053 , G03C1/07
摘要： A radiation-sensitive emulsion is disclosed in which at least 70 percent of total grain projected area is accounted for by tabular grains (a) having {100} major faces, (b) containing greater than 50 mole percent chloride, based on silver, (c) having a mean equivalent circular diameter in the range of from 2.0 to 5.0 .mu.m, and (d) exhibiting a mean thickness of 0.1 .mu.m or less. The emulsion is prepared by (a) precipitating up to 10 percent of the total silver forming the high chloride {100} tabular grains to create a first grain population under conditions that form a crystal lattice structure that favors the growth of high chloride {100} tabular grains, (b) thereafter rapidly introducing silver and halide ions to create a second grain population, and (c) growing the first grain population to create the high chloride {100} tabular grains by ripening out the second grain population.
摘要翻译：公开了一种辐射敏感乳液，其中总颗粒投影面积的至少70％由具有{100}主面的片状颗粒（a）占据，（b）基于银，含有大于50摩尔％的氯化物（ c）平均当量圆直径在2.0至5.0μm的范围内，和（d）平均厚度为0.1μm或更小。乳液通过以下步骤制备：（a）在形成高氯化物{100}片状颗粒的总银中沉淀高达10％，以在形成有利于高氯化物生长的晶格结构{100}的条件下产生第一晶粒群（b）随后快速引入银和卤离子以产生第二颗粒群体，和（c）通过熟化第二颗粒群体生长第一谷粒以产生高氯化物{100}片状颗粒。

16. 发明授权

US5413904A High chloride [100] tabular grain emulsions improved emulsions and improved precipitation processes 失效
标题翻译：高氯化物[100]片状颗粒乳剂改善了乳液和改进的沉淀过程
公开(公告)号：US5413904A
公开(公告)日：1995-05-09
申请号：US253532
申请日：1994-06-03
申请人： Yun C. Chang , Pierre-Henri Jezequel
发明人： Yun C. Chang , Pierre-Henri Jezequel
IPC分类号： G03C1/00 , G03C1/005 , G03C1/015 , G03C1/035
CPC分类号： G03C1/0053 , G03C1/015 , G03C2001/0156 , G03C2001/03558 , G03C2200/01
摘要： An improved preparation of high chloride {100} tabular grain emulsions that relies on iodide ions to produce tabular grain growth is disclosed. By delaying iodide ion introduction until after the initiation of grain nucleation the proportion of total grain projected area accounted for by high chloride {100} tabular grains is increased. The projected areas of the {100} tabular grains can exceed 95 percent of total grain projected area.
摘要翻译：公开了一种改进的依赖碘离子产生片状晶粒生长的高氯化物{100}片状颗粒乳剂的制备方法。通过延迟碘离子引入直到晶粒成核开始之后，高氯化物{100}片状颗粒占总颗粒投影面积的比例增加。 {100}片状谷物的投影面积可以超过总颗粒投影面积的95％。

17. 发明授权

US5176992A Process for the preparation of a grain stabilized high chloride tabular grain photographic emulsion (II) 失效
标题翻译：用于制备颗粒稳定的高氯化物片状颗粒照相乳剂（II）的方法
公开(公告)号：US5176992A
公开(公告)日：1993-01-05
申请号：US820181
申请日：1992-01-13
申请人： Joe E. Maskasky , Yun C. Chang
发明人： Joe E. Maskasky , Yun C. Chang
IPC分类号： G03C1/015 , G03C1/005 , G03C1/035 , G03C1/07
CPC分类号： G03C1/0053 , G03C1/07 , G03C1/015 , G03C1/12 , G03C1/34 , G03C2001/0055 , G03C2001/0156 , G03C2001/03517 , G03C2200/03 , G03C2200/43 , G03C2200/44
摘要： A process is disclosed of preparing an emulsion for photographic use comprising forming in the presence of an xanthinoid grain growth modifier an emulsion comprised of silver halide grains and a gelatino-peptizer dispersing medium in which morphologically unstable tabular grains having {111} major faces account for greater than 50 percent of total grain projected area and contain at least 50 mole percent chloride, based on silver. After the emulsion is formed, the pH of the emulsion is lowered to inactivate xanthinoid grain growth modifier, and the inactivated xanthinoid is replaced on the tabular grain surfaces by adsorption of a photographically useful compound chosen to contain at least one divalent sulfur atom, thereby concurrently morphologically stabilizing the tabular grains and enhancing their photographic utility.

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