会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 42. 发明授权
    • Antenna with double groundings
    • 双天线天线
    • US08228237B2
    • 2012-07-24
    • US12484252
    • 2009-06-15
    • Pei-Ling TengYi-Chun Chen
    • Pei-Ling TengYi-Chun Chen
    • H01Q1/38
    • H01Q9/0421H01Q1/48H01Q9/0428
    • An antenna with double groundings, including a body part, a feeding part, a first grounding part, and a second grounding part, is provided. The body part is electrically connected to the feeding part, the first grounding part, and the second grounding part respectively. The body part is corresponding to a resonance length to transmit and receive a radiation wave with a wavelength at an operating frequency. Wherein, a current path from the first grounding part to the feeding part along the body part is ½ times of the wavelength at the operating frequency, and a relative distance between the second grounding part and the first grounding part is ¼ times of the wavelength at the operating frequency.
    • 提供具有双重接地的天线,包括主体部分,馈电部分,第一接地部分和第二接地部分。 主体部分分别电连接到馈电部分,第一接地部分和第二接地部分。 身体部分对应于用于发送和接收具有工作频率的波长的辐射波的共振长度。 其中,沿着主体部分的从第一接地部分到馈送部分的电流路径是工作频率下的波长的1/2倍,并且第二接地部分和第一接地部分之间的相对距离是波长的1/4倍 工作频率。
    • 49. 发明授权
    • Process for the polymerization or copolymerization of ethylene using
mao-  or borate-free single site catalysts
    • 使用无硼酸盐或无硼酸盐的单中心催化剂聚合或共聚乙烯的方法
    • US5684098A
    • 1997-11-04
    • US602206
    • 1996-02-15
    • Shian-Jy WangYi-Chun ChenShu-Hua ChanJing-Cheing TsaiChing Ting
    • Shian-Jy WangYi-Chun ChenShu-Hua ChanJing-Cheing TsaiChing Ting
    • C08F4/619C08F4/6192C08F4/62C08F4/622C08F4/64C08F4/642C08F10/00C08F10/02
    • C08F10/00C08F10/02C08F4/61908C08F4/61912C08F4/6192Y10S526/943
    • A novel organometallic compound is disclosed which can be used, in conjunction with a trialkyl or bialkyl aluminum cocatalyst, for catalyzing the polymerization and copolymerization of ethylene without requiring the use of either methyl aluminoxane or borate as cocatalyst. The organometallic compound is represented by the formula of (C.sub.5 R.sub.n H.sub.5-n)(L)MX.sub.a Y.sub.b ; wherein: (a) C.sub.5 R.sub.n H.sub.5-n is a substituted or unsubstituted cyclopentadienyl group, in which n is an integer between 0 and 5, and R is C.sub.1 to C.sub.6 alkyl group; (b) L is tetrapyrazolyl borate, hydrotrispyrazolyl borate, dihydrobispyrazolyl borate or hydrotris(3,5-dimethylpyrazolyl) borate; (c) M is a Group IIIB, Group IVB, or Group VB transitional metal; (d) a and b are integers such that a+b=m-2, where m is the valance of M; and (e) X and Y, which can be the same of different from each other, are halogen atoms or ligands represented by the formula of ER.sup.1, where E is a Group VA or VIA element, and R.sup.1 is C.sub.1 to C.sub.6 alkyl group, aryl group or halogen-substituted aryl group. Preferably, M is a Group IVB transitional metal and a=b=1, and the organometallic compound is then represented by the formula of (C.sub.5 R.sub.n H.sub.5-n)(L)MXY.
    • 公开了一种可与三烷基或双烷基铝助催化剂结合使用的用于催化乙烯的聚合和共聚而不需要使用甲基铝氧烷或硼酸盐作为助催化剂的新型有机金属化合物。 有机金属化合物由式(C5RnH5-n)(L)MXaYb表示; 其中:(a)C5RnH5-n是取代或未取代的环戊二烯基,其中n是0和5之间的整数,R是C1-C6烷基; (b)L是四吡唑基硼酸盐,氢四唑基硼酸盐,二氢双吡唑基硼酸盐或氢化三(3,5-二甲基吡唑基)硼酸盐; (c)M是IIIB族,IVB族或VB族过渡金属; (d)a和b是整数,使得a + b = m-2,其中m是M的化合价; 和(e)可以彼此不同的X和Y是由式ER1表示的卤素原子或配体,其中E是VA族或VIA族,R1是C1-C6烷基, 芳基或卤素取代的芳基。 优选地,M是IVB族过渡金属,a = b = 1,有机金属化合物由式(C5RnH5-n)(L)MXY表示。