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    • 8. 发明授权
    • Dye releasing couplers for color diffusion transfer elements with dye
barrier layers
    • US5342730A
    • 1994-08-30
    • US952444
    • 1992-09-28
    • Thomas R. WelterJohn Texter
    • Thomas R. WelterJohn Texter
    • G03C8/08G03C8/52G03C5/54
    • G03C8/52G03C8/08
    • In accordance with this invention a photographic color diffusion transfer element and process for its development are provided. The element comprises a single dimensionally stable support, wherein said support comprises an opaque and light reflecting layer, and coated thereon in reactive association and in sequence (1) a mordant layer for binding diffusible dyes, (2) a stripping layer, (3) one or more layers comprising radiation sensitive silver halide and a diffusible-dye forming coupler, and (4) a barrier layer comprising a polymer that (a) allows the passage of solutions for processing said element when said element is contacted with an external processing bath and (b) impedes the diffusion out of said element of the diffusible dye formed from said diffusible-dye forming coupler, and wherein said diffusible-dye forming coupler is of the structureCp-L-DyewhereinCp is a coupler radical selected from the group comprising cyan dye forming radicals, magenta dye forming radicals, yellow dye forming radicals, black dye forming radicals, and colorless product forming radicals, said Cp being substituted in the coupling position with a divalent linking group, L;Dye is a dye radical exhibiting selective absorption in the visible spectrum and contains a solubilizing group;and where said -L-Dye group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent. In another preferred embodiment, said element comprises a single dimensionally stable transparent support, and coated thereon in reactive association and in sequence (1) a mordant layer for binding diffusible dyes, (2) an opacifying light reflecting layer, (3) one or more layers comprising radiation sensitive silver halide and a diffusible-dye forming coupler, and (4) a barrier layer comprising a polymer that (a) allows the passage of solutions for processing said element when said element is contacted with an external processing bath and (b) impedes the diffusion out of said element of the diffusible dye formed from said diffusible-dye forming coupler. In another preferred embodiment, said element comprises a single dimensionally stable transparent support, and coated thereon in reactive association and in sequence (1) one or more layers comprising radiation sensitive silver halide and a diffusible-dye forming coupler, (2) an opacifying light reflecting layer, (3) a mordant layer for binding diffusible dyes, and (4) a barrier layer comprising a polymer that (a) allows the passage of solutions for processing said element when said element is contacted with an external processing bath and (b) impedes the diffusion out of said element of the diffusible dye formed from said diffusible-dye forming coupler.
    • 10. 发明授权
    • Herbicidal thioparaconic acid derivatives
    • 除草硫代参糖酸衍生物
    • US5176738A
    • 1993-01-05
    • US769606
    • 1991-10-01
    • Thomas R. Welter
    • Thomas R. Welter
    • C07D333/38
    • C07D333/38
    • A method of controlling plant growth is provided comprising applying to the plants or to a habitat thereof a herbicidally effective amount of a compound having the structure: ##STR1## wherein R.sup.1 is selected from the group consisting of carboxy, cyano, ester ##STR2## wherein R.sup.2 is selected from the group consisting of a straight-chained alkyl group or a branched-chained alkyl group, of about 1 to 8 carbon atoms.R.sup.3 and R.sup.4 are selected from the group consisting of hydrogen, alkyl of about 1 to 8 carbon atoms, cycloalkyl of about 5 to 6 carbon atoms, and heterocyclyl of about 5 to 6 carbon and hetero atoms, or,R.sup.3 and R.sup.4 taken together with the nitrogen atoms to which they are attached form a heterocyclyl group having 5 to 6 carbon and hetero atoms. Also, novel compounds having the above structure are provided.
    • 提供了控制植物生长的方法,包括向植物或其栖息地施加除草有效量的具有以下结构的化合物:其中R 1选自羧基,氰基,酯,其中 R2选自具有约1至8个碳原子的直链烷基或支链烷基。 R 3和R 4选自氢,约1至8个碳原子的烷基,约5至6个碳原子的环烷基,以及约5至6个碳原子和杂原子的杂环基,或者,R 3和R 4与 它们所连接的氮原子形成具有5至6个碳原子和杂原子的杂环基。 此外,提供具有上述结构的新化合物。