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    • 2. 发明授权
    • Application and utilization of a water-soluble polymer on a surface
    • 表面上应用和利用水溶性聚合物
    • US06783525B2
    • 2004-08-31
    • US10021532
    • 2001-12-12
    • Darcy W. GreepWilliam G. Pitt
    • Darcy W. GreepWilliam G. Pitt
    • A61B1818
    • A61B18/14A61B2018/00083A61B2018/00142
    • Methods, systems, and devices for applying and utilizing a water-soluble polymer on a surface to provide desirable properties, attributes and/or characteristics to the surface. In a first embodiment, the water-soluble polymer at least partially fills one or more pores of a fluoropolymer or a porous metal. In a second implementation, the water-soluble polymer is mixed into a base material and the mixture is applied as a coating layer onto the surface. Where the surface is an electrosurgical electrode tip, the desirable properties, attributes and/or characteristics may include the ability to attract water that assists in cooling and/or lubricating the tip, to create a low shear, sacrificial layer that protects and enhances the tip, to supply a radical scavenger or inhibitor that reduces damage at the tip, and/or to deposit factors, such as healing factors, from the tip onto one or more contact surfaces of the patient's body.
    • 用于在表面上施用和利用水溶性聚合物以向表面提供所需性质,属性和/或特性的方法,系统和装置。 在第一个实施方案中,水溶性聚合物至少部分地填充含氟聚合物或多孔金属的一个或多个孔。 在第二个实施方案中,将水溶性聚合物混合到基材中,并将混合物作为涂层施加到表面上。 当表面是电外科电极尖端时,期望的性质,属性和/或特征可以包括吸引有助于冷却和/或润滑尖端的水的能力,以产生保护和增强尖端的低剪切牺牲层 ,以提供一种自由基清除剂或抑制剂,其减少尖端处的损伤和/或将诸如愈合因子的因素从尖端沉积到​​患者身体的一个或多个接触表面上。
    • 3. 发明授权
    • Stabilization and acoustic activation of polymeric micelles for drug delivery
    • 用于药物递送的聚合胶束的稳定和声学活化
    • US06649702B1
    • 2003-11-18
    • US09979481
    • 2002-08-07
    • Natalya RapoportWilliam G. Pitt
    • Natalya RapoportWilliam G. Pitt
    • C08L5300
    • A61K9/5138A61K9/0009A61K9/1075A61K9/5146C08G65/32C08G2650/58C08L71/02C08L2666/04
    • Methods are disclosed in which a micelle is stabilized against degradation upon dilution. The micelle comprises molecules of a block polymer having a hydrophobic block and a hydrophilic block. The hydrophobic block forms a core of the micelle with corona from the hydrophilic block. The methods for stabilizing the core are (1) by chemically cross-linking, (2) incorporating a hydrophobic oil (vegetable oil) in the core to render it more hydrophobic and stable, and (3) incorporating a cross-linked interpenetrating network of a stimuli-responsive hydrogel into the core. The hydrogel is responsive to any stimuli, but preferably temperature or pH. A substance such as, drugs, can be incorporated into the dense inner core of the micelles. When subjected to ultrasound, the micelles release the substance, and then reversibly revert to a stable dense core and re-encapsulating the substance when the ultrasound is turned off. By pulsing the ultrasound, it is therefore, to controllably release the substance in a pulsed manner corresponding to the ultrasound signal.
    • 公开了在稀释时胶束稳定以免降解的方法。 胶束包括具有疏水嵌段和亲水嵌段的嵌段聚合物的分子。 疏水嵌段由亲水嵌段形成具有电晕的胶束核心。 用于稳定核心的方法是(1)通过化学交联,(2)在核心中加入疏水性油(植物油)以使其更具疏水性和稳定性,和(3)结合交联的互穿网络 刺激性反应性水凝胶进入核心。 水凝胶对任何刺激都有响应,但优选温度或pH。 药物等物质可以并入胶束的致密内核中。当进行超声波处理时,胶束释放物质,然后当超声波转动时,可逆地还原成稳定的致密核心并重新封装物质 关闭 通过脉冲超声波,因此可以以对应于超声信号的脉冲方式可控地释放物质。
    • 4. 发明授权
    • Enhanced thermoplastic adhesion to fibers by using plasma discharge
    • 通过使用等离子体放电增强纤维的热塑性附着力
    • US5108780A
    • 1992-04-28
    • US647597
    • 1991-01-28
    • William G. PittJohn E. Lakenan
    • William G. PittJohn E. Lakenan
    • B29B15/08B29B15/12B29C59/14C08J5/06
    • B29B15/08B29B15/125B29C59/14C08J5/06B29C2037/90
    • A device and method for enhancing adhesion between an embedded filler component and surrounding thermoplastic matrix which together form a composite material. The filler component is subjected to plasma discharge and subsequently maintained in an inert environment to protect the treated surface area against premature exposure to reactive substances. While maintained in this inert environment, the treated surface is coated with a thermoplastic polymer and solidified. This coated filler is then capable of processing into composite materials. The device comprises an enclosure which is adapted which includes a containment space and environment control for maintaining inert conditions during application of plasma discharge and coating with thermoplastic polymer.
    • 一种用于增强嵌入填料组分和周围热塑性基质之间的粘合力的装置和方法,其一起形成复合材料。 对填料组分进行等离子体放电,随后保持在惰性环境中,以保护被处理的表面区域免于过早暴露于反应物质。 在保持在该惰性环境中的同时,将处理过的表面涂覆有热塑性聚合物并固化。 然后,该涂覆的填料能够加工成复合材料。 该装置包括适于包括容纳空间和环境控制的外壳,用于在用热塑性聚合物施加等离子体放电和涂覆期间保持惰性条件。
    • 6. 发明授权
    • Accelerated impact testing apparatus
    • 加速冲击试验装置
    • US5739411A
    • 1998-04-14
    • US768861
    • 1996-12-17
    • Nathan J. LeeWilliam G. Pitt
    • Nathan J. LeeWilliam G. Pitt
    • G01N3/48G01N3/52G01N33/00G01N3/00
    • G01N3/48G01N3/52G01N2033/008
    • Accelerated impact testing apparatus which simulates the dynamic strain in golf clubs, shafts and other specimens by rapidly transferring kinetic energy to the specimen from an instrumented tup that is free to rebound. The specimen is held in place by two holding fixtures uniquely designed to provide the appropriate boundary and support conditions for the transient strain to propagate in a manner similar to that of the actual application e.g. a golf club striking a ball. Force applied to the tup is generated by compressing a spring to a predetermined length and releasing its energy through a rapidly actuated latch. Actual force applied as a function of time is measured by a load cell located in the tup and the tup velocity just prior to impact is computed from a velocity sensor signal. Acceleration of the impact event is also recorded as well as strain levels in the shaft.
    • 加速冲击试验装置,通过从能够自由反弹的仪表托盘快速将动能转移到试样上,模拟高尔夫球杆,轴和其他试样中的动态应变。 样品通过两个固定装置固定在适当的位置,其独特地设计成为瞬时应变提供适当的边界和支撑条件,以与实际应用类似的方式传播。 一个打高尔夫球的球。 通过将弹簧压缩到预定长度并通过快速致动的闩锁释放其能量来产生施加到托盘上的力。 作为时间的函数施加的实际力由位于tup中的测力传感器测量,并且刚好在冲击之前的速度传感器信号由速度传感器信号计算。 还记录了冲击事件的加速度以及轴中的应变水平。
    • 8. 发明授权
    • Accelerated impact testing apparatus
    • 加速冲击试验装置
    • US5696312A
    • 1997-12-09
    • US556584
    • 1995-11-13
    • Nathan J. LeeWilliam G. Pitt
    • Nathan J. LeeWilliam G. Pitt
    • G01N3/48G01N3/52G01N33/00G01N3/00
    • G01N3/48G01N3/52G01N2033/008
    • Accelerated impact testing apparatus which simulates the dynamic strain in golf clubs, shafts and other specimens by rapidly transferring kinetic energy to the specimen from an instrumented tup that is free to rebound. The specimen is held in place by two holding fixtures uniquely designed to provide the appropriate boundary and support conditions for the transient strain to propagate in a manner similar to that of the actual application e.g. a golf club striking a ball. Force applied to the tup is generated by compressing a spring to a predetermined length and releasing its energy through a rapidly actuated latch. Actual force applied as a function of time is measured by a load cell located in the tup and the tup velocity just prior to impact is computed from a velocity sensor signal. Acceleration of the impact event is also recorded as well as strain levels in the shaft.
    • 加速冲击试验装置,通过从能够自由反弹的仪表托盘快速将动能转移到试样上,模拟高尔夫球杆,轴和其他试样中的动态应变。 样品通过两个固定装置固定在适当的位置,其独特地设计成为瞬时应变提供适当的边界和支撑条件,以与实际应用类似的方式传播。 一个打高尔夫球的球。 通过将弹簧压缩到预定长度并通过快速致动的闩锁释放其能量来产生施加到托盘上的力。 作为时间的函数施加的实际力由位于tup中的测力传感器测量,并且刚好在冲击之前的速度传感器信号由速度传感器信号计算。 还记录了冲击事件的加速度以及轴中的应变水平。
    • 9. 发明授权
    • DNA sequencing using fluorescence background electroblotting membrane
    • DNA序列使用荧光背景电泳膜
    • US5112736A
    • 1992-05-12
    • US365693
    • 1989-06-14
    • Karin D. CaldwellTun-Jen ChuWilliam G. Pitt
    • Karin D. CaldwellTun-Jen ChuWilliam G. Pitt
    • B01D67/00C12Q1/68
    • B01D67/0093C12Q1/6869C12Q1/6874B01D2323/30Y10S435/805Y10S436/80Y10S436/807Y10T436/175383
    • A method for the multiplex sequencing on DNA is disclosed which comprises the electroblotting or specific base terminated DNA fragments, which have been resolved by gel electrophoresis, onto the surface of a neutral non-aromatic polymeric microporous membrane exhibiting low background fluorescence which has been surface modified to contain amino groups. Polypropylene membranes are preferably and the introduction of amino groups is accomplished by subjecting the membrane to radio or microwave frequency plasma discharge in the presence of an aminating agent, preferably ammonia. The membrane, containing physically adsorbed DNA fragments on its surface after the electroblotting, is then treated with crosslinking means such as UV radiation or a glutaraldehyde spray to chemically bind the DNA fragments to the membrane through said smino groups contained on the surface thereof. The DNA fragments chemically bound to the membrane are subjected to hybridization probing with a tagged probe specific to the sequence of the DNA fragments. The tagging may be by either fluorophores or radioisotopes. The tagged probes hybridized to said target DNA fragments are detected and read by laser induced fluorescence detection or autoradiograms. The use of aminated low fluorescent background membranes allows the use of fluorescent detection and reading even when the available amount of DNA to be sequenced is small. The DNA bound to the membrances may be reprobed numerous times.
    • 公开了一种用于DNA上多重测序的方法,该方法包括已经通过凝胶电泳解析的电印迹或特异性碱基封端的DNA片段到已经表面改性的显示低背景荧光的中性非芳族聚合物微孔膜的表面上 含有氨基。 聚丙烯膜是优选的,氨基的引入是通过在胺化剂,优选氨的存在下使膜进行无线电或微波频率等离子体放电来实现的。 然后在电印迹之后在其表面上含有物理吸附的DNA片段的膜用诸如UV辐射或戊二醛喷雾剂的交联手段进行处理,以通过其表面上包含的所述唾液酸基将DNA片段化学结合到膜上。 用与DNA片段序列特异的标记探针对化学键合到膜上的DNA片段进行杂交探测。 标记可以是荧光团或放射性同位素。 通过激光诱导荧光检测或放射自显影检测和读取与所述靶DNA片段杂交的标记探针。 使用胺化的低荧光背景膜允许使用荧光检测和阅读,即使待测DNA的可用量很小。 与膜结合的DNA可以重复多次。