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    • 34. 发明授权
    • Production method of silicon carbide particles
    • 碳化硅颗粒的生产方法
    • US06251353B1
    • 2001-06-26
    • US08916638
    • 1997-08-22
    • Meisetsu KajiwaraMasao HashimotoHiroaki Wada
    • Meisetsu KajiwaraMasao HashimotoHiroaki Wada
    • C01B3136
    • B82Y30/00C01B32/956C01P2004/61C01P2004/62C01P2004/64C01P2006/12C01P2006/80
    • The present invention is to provide a production method of silicon carbide particles of high quality without generating a sulfur compound in the carbonizing and baking processes. More concretely, a production method of silicon carbide particles comprising a step of mixing at least one kind of a silicon compound, which is liquid at ordinary temperatures, an organic compound having a functional group, which generates carbon by heating and is liquid at ordinary temperatures, and a polymerization or crosslinking catalyst, which can homogeneously dissolve with the organic compound to obtain a mixture, a step of homogeneously solidifying the mixture to obtain solid matter, and a step of heating and baking the solid matter in a non-oxidizing atmosphere, wherein the catalyst is a compound consisting of carbon atoms, hydrogen atoms and oxygen atoms, and has a carboxyl group.
    • 本发明提供一种在碳化和烘烤过程中不产生硫化合物的高质量碳化硅颗粒的生产方法。 更具体地说,一种碳化硅颗粒的制造方法,其特征在于,包括将常温下为液体的至少一种硅化合物与通过加热生成碳并在常温下为液体的具有官能团的有机化合物 和可与有机化合物均匀溶解以获得混合物的聚合或交联催化剂,将混合物均匀固化以获得固体物质的步骤,以及在非氧化性气氛中加热和烘烤固体物质的步骤, 其中催化剂是由碳原子,氢原子和氧原子组成的化合物,并具有羧基。
    • 37. 发明授权
    • Digital local switching system for integrated service digital network
    • 数字本地交换系统,用于综合业务数字网络
    • US4731782A
    • 1988-03-15
    • US872810
    • 1986-06-11
    • Tomoyoshi ShimizuYoshinori YoshidaMasao HashimotoHideki Nakane
    • Tomoyoshi ShimizuYoshinori YoshidaMasao HashimotoHideki Nakane
    • H04M11/06H04Q11/04H04J3/22
    • H04Q11/0428H04M11/068
    • An integrated service network ("ISDN") is structured to connect subscriber lines through a packet switching system to incoming or outgoing packet switching calls without passing them through a circuit switching system. This effectively uses the speech path of the circuit switching section instead of using it for packet switching calls. At the same time, the invention minimizes the influence of the introduction of the ISDN upon the software of the circuit switching section. The ISDN digital switching network applies to circuit switching calls which are switched at a local switch and to packet switching calls which are to be switched at a toll switch. The digital switching system separates calls into circuit switching calls which are transferred through B channels, packet switching calls which are transferred through B channels, and packet switching calls which are transferred through D channels in order to connect the circuit switching calls to a time division switch and the packet switching calls to a packet multiplexer. The packets are concentrated and multiplexed into separated packet switching calls. The circuit switching calls from the time division switch are multiplexed with the packet switching calls from the packed multiplexer and are placed in predetermined time slots in accordance with a band width designated corresponding to respective call traffic.
    • 综合服务网络(“ISDN”)被构造成通过分组交换系统将用户线路连接到传入或传出分组交换呼叫,而不通过电路交换系统。 这有效地使用电路交换部分的语音路径而不是用于分组交换呼叫。 同时,本发明使ISDN引入对电路切换部分的软件的影响最小化。 ISDN数字交换网络适用于在本地交换机处切换的电路交换呼叫以及要在长途交换机上切换的分组交换呼叫。 数字交换系统将呼叫分为通过B信道传送的电路交换呼叫,通过B信道传送的分组交换呼叫和通过D信道传送的分组交换呼叫,以将电路交换呼叫连接到时分开关 并且分组交换呼叫到分组多路复用器。 分组集中并复用成分离的分组交换呼叫。 来自时分开关的电路切换呼叫与来自打包多路复用器的分组交换呼叫多路复用,并且根据对应于各个呼叫业务指定的频带宽度而被放置在预定时隙中。