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71 条记录 (耗时 0.036 秒)

    Combined nerve fiber and body tissue stimulation apparatus and method
    31.
    发明授权
    Combined nerve fiber and body tissue stimulation apparatus and method 失效
    组合神经纤维和身体组织刺激装置及方法

    公开(公告)号：US5117826A

    公开(公告)日：1992-06-02

    申请号：US696987

    申请日：1991-05-02

    申请人： James T. Bartelt ,  Frank W. Harris

    发明人： James T. Bartelt ,  Frank W. Harris

    IPC分类号： A61N1/34 ,  A61N1/36

    CPC分类号： A61N1/36021

    摘要： An electronic device and method are disclosed for effecting both nerve fiber and body tissue stimulation. Nerve fiber stimulation is primarily effected by application of pulses, and preferably by application of biphasic pulse pairs the pulses of which are spaced from one another in a pattern such that nerve fiber stimulation applied through plural active electrodes enhances pain suppression. Body tissue treatment is primarily effected by application of a net DC charge, and preferably by application of biphasic pulses that includes a greater number of either negative or positive pulses so that a net DC charge results. The DC charge level is maintained at a substantially constant selected value regardless of pulse variations within established broad limits, and the DC charge level is adjustable between operational modes, as needed.

    摘要翻译： 公开了用于实现神经纤维和身体组织刺激的电子装置和方法。 神经纤维刺激主要通过施加脉冲来实现，并且优选地通过施加双脉冲对，其脉冲以图案彼此间隔开，使得通过多个活性电极施加的神经纤维刺激增强疼痛抑制。 身体组织治疗主要通过施加净DC电荷来实现，并且优选地通过应用包括更多数量的负脉冲或正脉冲的双相脉冲来实现净DC电荷。 直流充电电平保持在基本上恒定的选择值，而不管所建立的宽限制内的脉冲变化如何，并且DC充电电平根据需要在操作模式之间是可调节的。

    Preparation of tetraketones
    34.
    发明授权
    Preparation of tetraketones 失效
    四氢呋喃的制备

    公开(公告)号：US4082806A

    公开(公告)日：1978-04-04

    申请号：US641958

    申请日：1975-12-18

    申请人： Frank W. Harris ,  Bruce A. Reinhardt

    发明人： Frank W. Harris ,  Bruce A. Reinhardt

    IPC分类号： C07C45/28 ,  C07C45/30 ,  C07C49/784 ,  C07D213/50 ,  C07C49/76

    CPC分类号： C07D213/50 ,  C07C45/28 ,  C07C45/30 ,  C07C49/784

    摘要： A method of preparing tetraketone precursors which are useful in the production of high temperature resistant polyquinoxaline resins. Suitable diketones are oxidized with a halogenating agent, such as cupric halide or hydrogen bromide, and dimethylsulfoxide to produce the corresponding tetraketone. The tetraketones which can be produced by the instant process have the formula: ##STR1## wherein R is hydrogen or an aryl, substituted aryl, heterocyclic or substituted heterocyclic radical and R' is an aryl, substituted aryl, arylalkyl, arylether, arylthioether, arylsulfoxide, arylsulfone, heterocyclic or substituted heterocyclic radical.

    Phthalonitrile composites
    39.
    发明授权
    Phthalonitrile composites 有权
    邻苯二甲腈复合材料

    公开(公告)号：US07642336B2

    公开(公告)日：2010-01-05

    申请号：US11352841

    申请日：2006-02-13

    申请人： Gray E. Fowler ,  Emerald J. Adair ,  Michael M. Liggett ,  Dong Zhang ,  Frank W. Harris ,  Robert A. Gray

    发明人： Gray E. Fowler ,  Emerald J. Adair ,  Michael M. Liggett ,  Dong Zhang ,  Frank W. Harris ,  Robert A. Gray

    IPC分类号： C08G63/44 ,  C08G63/00

    CPC分类号： C08G73/00 ,  C08J5/24 ,  C08J2379/00 ,  Y10T428/2933

    摘要： The disclosed compositions and methods for producing composite materials that are suitably adapted for use in elevated temperature environments generally include the use of oxyarylbisorthodinitrile matrix resins in conjunction with aromatic amines to produce an improved phthalonitrile-based composite. Various features and specifications may be controlled, adapted or otherwise optionally modified to improve the temperature-rated performance of the disclosed composite materials. Exemplary embodiments of the present invention generally provide composite materials that offer improved strength at temperatures in excess of 600° F.

    摘要翻译： 用于生产适合于在高温环境中使用的复合材料的所公开的组合物和方法通常包括将芳基双异丁腈基树脂与芳族胺结合使用以产生改进的邻苯二甲腈基复合材料。 可以对各种特征和规格进行控制，调整或以其他方式任意地改性以改善所公开的复合材料的温度等级性能。 本发明的示例性实施方案通常提供在超过600°F的温度下提供改进的强度的复合材料。