Thienoimidazoppyridone derivatives
    41.
    发明授权
    Thienoimidazoppyridone derivatives 失效
    噻吩并咪唑吡啶衍生物

    公开(公告)号:US5342843A

    公开(公告)日:1994-08-30

    申请号:US98329

    申请日:1993-08-06

    CPC分类号: C07D495/14

    摘要: The present invention relates to a thienoimidazopyridone derivative represented by Formula (I): ##STR1## wherein A and B independently represent --S-- or --CH.dbd., X-Y-Z represents --N(R.sup.2)--CH.dbd.N-- or --N.dbd.CH--N (R.sup.2)-- wherein R.sup.2 is hydrogen, lower alkyl or --CH(R.sup.3)--(CH.sub.2).sub.n --R.sup.4 wherein R.sup.4 is phenyl, n is 0 or 1, and R.sup.3 is hydrogen or lower alkyl, and R.sup.1 represents lower alkyl, or a pharmaceutically acceptable salt thereof.

    摘要翻译: PCT No.PCT / JP92 / 01602 Sec。 371日期:1993年8月6日 102(e)日期1993年8月6日PCT提交1992年12月8日PCT公布。 公开号WO93 / 12116 PCT 本发明涉及由式(I)表示的噻吩并咪唑并吡啶酮衍生物:本发明-S-或-CH =,XYZ表示-N(R2)-CH = N-或-N = CH-N (R2) - 其中R2是氢,低级烷基或-CH(R3) - (CH2)n-R4,其中R4是苯基,n是0或1,R3是氢或低级烷基,R1代表低级烷基,或 其药学上可接受的盐。

    Xanthine derivatives
    42.
    发明授权
    Xanthine derivatives 失效
    黄嘌呤衍生物

    公开(公告)号:US5336769A

    公开(公告)日:1994-08-09

    申请号:US18209

    申请日:1993-02-16

    CPC分类号: C07D473/04

    摘要: A xanthine derivative of the formula (I): ##STR1## wherein R.sup.1 represents substituted or unsubstituted lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted alicyclic alkyl, substituted or unsubstituted phenyl, or substituted or unsubstituted benzyl;R.sup.2 represents --(CH.sub.2).sub.m --X, wherein m is 2 or 3, and X is ##STR2## wherein a is NH, O or S, b and d are the same or different and are CH or N, and R.sup.3 is lower alkyl, substituted or unsubstituted alicyclic alkyl, or substituted or unsubstituted phenyl, or ##STR3## wherein e, g and h are the same or different and are CH or N, and R.sup.3 is the same as defined above;Q represents substituted or unsubstituted alicyclic alkyl, ##STR4## wherein R.sup.4 and R.sup.5 are the same or different and are substituted or unsubstituted alicyclic alkyl, ##STR5## wherein Y is single bond or alkylene; and n is 0 or 1, ##STR6## wherein K-M is --CH.sub.2 --CH.sub.2 --or --CH.dbd.CH--, and Y is the same as defined above, or ##STR7## wherein Y is the same as defined above; or a pharmacologically acceptable salt thereof is disclosed.This derivative has anti-dementia activity.

    摘要翻译: 式(I)的黄嘌呤衍生物:其中R1表示取代或未取代的低级烷基,低级烯基,低级炔基,取代或未取代的脂环族烷基,取代或未取代的苯基或取代或未取代的苄基; R 2表示 - (CH 2)m X,其中m为2或3,并且X为H,其中a为NH,O或S,b和d相同或不同,为CH或N,且R 3为低级烷基, 取代或未取代的脂环族烷基或取代或未取代的苯基,或其中e,g和h相同或不同,为CH或N,并且R 3与上述定义相同; Q表示取代或未取代的脂环族烷基,不同且为取代或未取代的脂环族烷基,其中Y为单键或亚烷基; 并且n为0或1,其中K-M为-CH 2 -CH 2 - 或-CH = CH-,Y为与上述定义相同的基团,或者其中Y与上述定义相同。 或其药理学上可接受的盐。 该衍生物具有抗痴呆活性。

    Photo-taking lens for an underwater camera
    44.
    发明授权
    Photo-taking lens for an underwater camera 失效
    摄影镜头用于水下摄像机

    公开(公告)号:US5257137A

    公开(公告)日:1993-10-26

    申请号:US855665

    申请日:1992-03-23

    CPC分类号: G02B13/00

    摘要: A lens for an underwater camera is comprised of a first lens unit having no refractive power or having weak refractive power, a second lens unit comprising a forward unit having negative refractive power and a rearward unit having positive refractive power, and having weak refractive power, a third lens unit having positive refractive power, and a fourth lens unit having negative refractive power, the first lens unit being fixed relative to the image plane, the second lens unit and the third lens unit being axially moved together on the optical axis toward the object side relative to the fourth lens unit.

    摘要翻译: 一种用于水下摄像机的透镜由不具有屈光力或具有弱屈光力的第一透镜单元组成,第二透镜单元包括具有负屈光力的正射单元和具有正折光力的后向单元,并且具有弱折射力, 具有正折光力的第三透镜单元和具有负屈光力的第四透镜单元,第一透镜单元相对于像面固定,第二透镜单元和第三透镜单元在光轴上一起轴向移动到 物体侧相对于第四透镜单元。

    Papermaking method
    49.
    发明授权
    Papermaking method 失效
    造纸方法

    公开(公告)号:US4952279A

    公开(公告)日:1990-08-28

    申请号:US289550

    申请日:1988-12-23

    IPC分类号: C08B31/12 D21H17/29

    CPC分类号: D21H17/29 C08B31/125

    摘要: Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, charaacterized by the addition of a starch ether derivative of a general formula (I): ##STR1## where St--O represents a starch molecule residue, R.sub.1, R.sub.2 and R.sub.3 independently represent an alkyl group having from 1 to 18 carbon atoms or a benzyl group, provided that two or more of these R.sub.1, R.sub.2 and R.sub.3 must not be a benzyl group or an alkyl group having from 5 to 18 carbon atoms at the same time, and any two of these R.sub.1, R.sub.2 and R.sub.3 may be bonded to form a cyclic structure, the said derivative containing the ether bond preferably in a degree of substitution of from 0.01 from 0.1, to the said papermaking stock in an amount of from 0.05 to 5.0% by weight of the cellulose fiber or the total of the said fiber and the inorganic filler in the said stock, as well as the said starch ether derivative of the formula (I) and a method for preparation of the said derivative.

    Electrostatic recording material
    50.
    发明授权
    Electrostatic recording material 失效
    静电记录材料

    公开(公告)号:US4752522A

    公开(公告)日:1988-06-21

    申请号:US847525

    申请日:1986-04-03

    摘要: An electrostatic recording material comprising a substrate treated for low electric resistance and a dielectric layer formed on the substrate and composed of a composition comprising an insulating resin having a volume specific resistance of at least 10.sup.12 .OMEGA.cm and a powder of an acrylonitrile-type polymer having a copolymerized acrylonitrile content of at least 95% by weight and containing substantially no ionic groups, said powder having a volume average particle size of from 1.5 to 4 .mu.m and a content of particles having a size exceeding 8 .mu.m as measured by a particle size distribution measuring apparatus, being at most 0.02% by number.

    摘要翻译: 一种静电记录材料,包括用于低电阻处理的基底和形成在基底上的电介质层,该电介质层由包含体积电阻率为至少1012欧米亚厘米的绝缘树脂和丙烯腈型聚合物的粉末组成的组合物组成, 共聚丙烯腈含量为至少95重量%且基本上不含离子基团,所述粉末具有1.5至4μm的体积平均粒度和通过颗粒测量的尺寸超过8μm的颗粒含量 尺寸分布测量装置,数量至多0.02%。