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    • 34. 发明授权
    • Optical switch and optical switch device
    • 光开关和光开关器件
    • US06934440B2
    • 2005-08-23
    • US10718116
    • 2003-11-20
    • Norihiro DejimaNorio ChibaKenji KatoToshiya KuboHiromitsu NakayamaTakashi Niwa
    • Norihiro DejimaNorio ChibaKenji KatoToshiya KuboHiromitsu NakayamaTakashi Niwa
    • G02B26/08G02B6/26G02B6/35
    • G02B6/3514G02B6/262G02B6/266G02B6/3546G02B6/356G02B6/3594
    • An optical switch has at least first, second, and third optical fibers disposed generally parallel to each other and spaced at non-equal intervals in a direction substantially perpendicular to an optical axis of each of the optical fibers. The optical fibers have tip portions disposed approximately along a straight line extending in a direction substantially perpendicular to the optical axis of each of the optical fibers. A first non-movable guiding structure guides a beam of light emitted from the first optical fiber to the second optical fiber along a first optical path disposed between the tip portion of the first optical fiber and the tip portion of the second optical fiber. A second movable guiding structure guides the beam emitted from the first optical fiber to the third optical fiber along a second optical path disposed between the tip portion of the first optical fiber and the tip portion of the third optical fiber so that a length of the second optical path is substantially equal to a length of the first optical path.
    • 光学开关具有至少第一,第二和第三光纤,其大体上彼此平行地设置并且在基本上垂直于每个光纤的光轴的方向上以不等间隔隔开。 光纤具有大致沿着基本上垂直于每个光纤的光轴的方向延伸的直线设置的尖端部分。 第一非可移动引导结构沿着设置在第一光纤的末端部分和第二光纤的末端部分之间的第一光路将从第一光纤发射的光束引导到第二光纤。 第二可移动引导结构沿着设置在第一光纤的末端部分和第三光纤的末端部分之间的第二光路将从第一光纤发射的光束引导到第三光纤,使得第二光纤的长度 光路基本上等于第一光路的长度。
    • 40. 发明授权
    • Method of producing a vinyl acetate polymer and its saponification product
    • 乙酸乙烯酯聚合物及其皂化产物的制备方法
    • US06559254B2
    • 2003-05-06
    • US09781553
    • 2001-02-13
    • Kenji NinomiyaYoshiharu NagaoAkio HaraoKenji Kato
    • Kenji NinomiyaYoshiharu NagaoAkio HaraoKenji Kato
    • C08F1808
    • C08F18/08
    • The invention provides a process for producing a saponified vinyl acetate polymer (a saponified ethylene-vinyl acetate copolymer in particular) which features a minimum of coloration of molding pellets, a well-inhibited emanation of an odor in melt-molding, a high transparency of the product film and a low incidence of fish-eyes in the film, and a process for producing a vinyl acetate polymer (particularly an ethylene-vinyl acetate copolymer) for use as the starting material for said saponified vinyl acetate polymer having said favorable properties. In accordance with the invention, either vinyl acetate alone or vinyl acetate and one or more other monomers are polymerized in the presence of a hydroxylactone compound and a polymerization catalyst. The resulting vinyl acetate polymer (particularly the ethylene-vinyl acetate copolymer) is then saponified.
    • 本发明提供一种生产皂化的乙酸乙烯酯聚合物(特别是皂化的乙烯 - 乙酸乙烯酯共聚物)的方法,其特征在于最小的成型颗粒的着色,在熔融模塑中良好抑制的气味发散,高透明度 该薄膜中的产品薄膜和鱼眼的发生率低,以及用作所述具有良好性能的所述皂化乙酸乙烯酯聚合物的起始原料的乙酸乙烯酯聚合物(特别是乙烯 - 乙酸乙烯酯共聚物)的制备方法。 根据本发明,在羟基内酯化合物和聚合催化剂的存在下,单独使用乙酸乙烯酯或乙酸乙烯酯和一种或多种其它单体聚合。 然后将所得乙酸乙烯酯聚合物(特别是乙烯 - 乙酸乙烯酯共聚物)皂化。