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    Preparation of thin tabular grain silver halide emulsions using synthetic polymeric peptizers
    2.
    发明授权
    Preparation of thin tabular grain silver halide emulsions using synthetic polymeric peptizers 失效
    使用合成聚合物胶溶剂制备薄的片状银卤化银乳剂

    公开(公告)号：US5385819A

    公开(公告)日：1995-01-31

    申请号：US171588

    申请日：1993-12-22

    申请人： Wayne A. Bowman ,  Roger A. Weiss ,  Gerald W. Klein ,  John E. Keevert, Jr. ,  Shane C. Weber

    发明人： Wayne A. Bowman ,  Roger A. Weiss ,  Gerald W. Klein ,  John E. Keevert, Jr. ,  Shane C. Weber

    IPC分类号： G03C1/015 ,  G03C1/005 ,  G03C1/035 ,  G03C1/047 ,  G03C1/053 ,  G03C1/07 ,  G03C1/04

    CPC分类号： G03C1/053 ,  G03C1/0051

    摘要： A process for preparing a thin tabular grain silver halide emulsion comprised of silver halide grains which have a halide content of at least 50 mole percent bromide, wherein tabular grains of less than 0.15 micrometers in thickness and having an aspect ratio of greater than 8 account for greater than 50 percent of the total grain projected area, comprises the steps of nucleating the silver halide grains with a gelatino-peptizer or with the use of certain synthetic polymers that serve as effective nucleation peptizers and then growing the silver halide grains with the use of either a gelatino-peptizer or certain synthetic polymers that serve as effective growth peptizers.

    摘要翻译： 一种制备由卤化银颗粒组成的薄片状颗粒卤化银乳剂的方法，该卤化银颗粒的卤化物含量至少为50％（摩尔）溴化物，其中厚度小于0.15微米，长宽比大于8的片状颗粒占据 占总颗粒投影面积的大于50％的步骤包括用明胶胶溶剂将卤化银颗粒成核的步骤或使用某些合成聚合物作为有效的成核胶溶剂，然后使用 用作有效成长胶溶剂的明胶胶溶剂或某些合成聚合物。

    Process for the preparation of high bromide ultrathin tabular grain emulsions
    3.
    发明授权
    Process for the preparation of high bromide ultrathin tabular grain emulsions 失效
    高溴化超薄片状颗粒乳剂的制备方法

    公开(公告)号：US06228573B1

    公开(公告)日：2001-05-08

    申请号：US09464468

    申请日：1999-12-15

    申请人： John E. Keevert, Jr. ,  Joe E. Maskasky ,  Michael G. Antoniades

    发明人： John E. Keevert, Jr. ,  Joe E. Maskasky ,  Michael G. Antoniades

    IPC分类号： G03C1005

    CPC分类号： G03C1/07 ,  G03C1/0051 ,  G03C2001/03594 ,  G03C2200/03 ,  G03C2200/43

    摘要： A process for preparing an ultrathin high bromide {111} tabular grain silver halide emulsion in a reaction vessel comprising the steps of (a) forming in the presence of a dispersing medium a population of silver halide grain nuclei containing twin planes, and (b) growing the silver halide grain nuclei containing twin planes to form high bromide {111} tabular silver halide grains by the addition of silver and halide ions, WHEREIN the majority of the silver added during growth step (b) is added at a pBr of less than 2.6 and in the presence of a triaminopyrimidine grain growth modifier containing mutually independent 4, 5 and 6 ring position amino substituents, the 4 and 6 ring position substituents being hydroamino substituents. High bromide ultrathin {111} tabular grain emulsions prepared by the process of the invention provide thinner tabular grains than that obtained in the absence of the triaminopyrimidine grain growth modifier. Additionally, the double jet process of the invention is highly controllable and commercially scalable.

    摘要翻译： 一种在反应容器中制备超薄高溴酸盐{111}片状粒状卤化银乳剂的方法，包括以下步骤：（a）在分散介质存在下形成含有双面平面的卤化银颗粒核团，和（b） 生长含有双平面的卤化银颗粒核，通过加入银和卤离子形成高溴化物{111}片状卤化银颗粒，因为在生长步骤（b）中加入的大多数银以小于等于 2.6和在含有相互独立的4,5和6个环位氨基取代基的三氨基嘧啶晶粒生长调节剂存在下，4和6环位置取代基是氢氨基取代基。 通过本发明的方法制备的高溴化超薄{111}片状颗粒乳剂提供比不存在三氨基嘧啶晶粒生长调节剂时更薄的片状颗粒。 此外，本发明的双喷射方法是高度可控的和商业上可扩展的。

    Control of methionine content in photographic grade gelatin
    5.
    发明授权
    Control of methionine content in photographic grade gelatin 失效
    摄影级明胶中甲硫氨酸含量的控制

    公开(公告)号：US5412075A

    公开(公告)日：1995-05-02

    申请号：US227171

    申请日：1994-04-13

    申请人： Donald P. Wrathall ,  John E. Keevert, Jr. ,  Gregg C. Hider ,  John S. Brand

    发明人： Donald P. Wrathall ,  John E. Keevert, Jr. ,  Gregg C. Hider ,  John S. Brand

    IPC分类号： C07K14/78 ,  G03C1/047 ,  C07K4/12

    CPC分类号： C07K14/78 ,  G03C1/047 ,  Y10S530/84

    摘要： The method for preparing high grade gelatin with a specific methionine content and with reduced methionine variability from batch to batch and within a single extraction includes controlling the amount of and variability of oxidant present during processing of bone stock into gelatin. Such controls include control of oxidant concentration and range in process water, control of volume of process water used in gelatin-making process and restriction of the range of gelatin extracts used in the product gelatin. Once the aim level of oxidant has been set, the total range of oxidant around the set point should be less than 220 meq per 100 kg dry bone.

    摘要翻译： 用于制备具有特定甲硫氨酸含量并且具有降低的甲硫氨酸变异性的批次和单次提取的高级明胶的方法包括控制在将骨料加工成明胶期间存在的氧化剂的量和变异性。 这样的控制包括控制氧化剂浓度和工艺水中的范围，控制明胶生产过程中使用的工艺水的体积以及限制产品明胶中使用的明胶提取物的范围。 一旦设定了氧化剂的目标水平，设定点周围的氧化剂的总范围应小于每100 kg干骨中的220meq。

    Ultrathin tabular grain silver halide emulsion with improved performance in multilayer photographic element
    7.
    发明授权
    Ultrathin tabular grain silver halide emulsion with improved performance in multilayer photographic element 失效
    具有改善多层照相元件性能的超薄片状银卤化银乳剂

    公开(公告)号：US06656674B2

    公开(公告)日：2003-12-02

    申请号：US10027300

    申请日：2001-12-21

    申请人： Tommie L. Royster, Jr. ,  John E. Keevert, Jr. ,  Sharon G. Johnston ,  Donald L. Black ,  David W. Sandford

    发明人： Tommie L. Royster, Jr. ,  John E. Keevert, Jr. ,  Sharon G. Johnston ,  Donald L. Black ,  David W. Sandford

    IPC分类号： G03C1005

    CPC分类号： G03C1/0051 ,  G03C2001/03511 ,  G03C2001/03552 ,  G03C2001/03564 ,  G03C2200/03

    摘要： A photographic element which comprises a support bearing: (i) a first radiation-sensitive silver halide emulsion image-forming layer comprising a high bromide tabular grain emulsion including tabular grains having {111} major faces, exhibiting an average thickness of at least 0.07 &mgr;m and an average aspect ratio of at least 2; and (ii) a second radiation-sensitive silver halide emulsion image-forming layer comprising an ultrathin tabular grain emulsion including tabular grains having {111} major faces, containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, exhibiting an average thickness of less than 0.07 &mgr;m and an average equivalent circular diameter of at least 0.7 &mgr;m, and having latent image forming chemical sensitization sites on the surfaces of the tabular grains; wherein the surface chemical sensitization sites include epitaxially deposited silver halide protrusions containing an actual chloride concentration of from 20-50 mole %, based on epitaxially deposited silver, the chloride concentration being at least 10 mole percent higher than that of the tabular grains, and containing an actual iodide concentration of from 1 to 7 mole %, based on epitaxially deposited silver.

    摘要翻译： 一种照相元件，其特征在于，包括一支承体：（i）第一辐射敏感的卤化银乳剂图像形成层，其包含高溴化物片状颗粒乳剂，其包含具有{111}主面的平片状颗粒，平均厚度至少为0.07μm 平均纵横比至少为2; 和（ii）包含超薄片状颗粒乳剂的第二种辐射敏感的卤化银乳剂图像形成层，其包括具有{111}主面的片状颗粒，其含有大于70摩尔％的溴化物和至少0.25摩尔％的碘化物， 厚度小于0.07μm，平均当量圆直径至少为0.7μm，并且在片状颗粒的表面上具有潜像形成的化学敏化位点; 其中所述表面化学增感部位包括外延沉积的银离子突出物，所述外延沉积的卤化银突起物以外延沉积的银为基准，其实际氯化物浓度为20-50摩尔％，氯化物浓度比片状颗粒高至少10摩尔％，并含有 实际的碘化物浓度为1至7摩尔％，基于外延沉积的银。