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    • 51. 发明授权
    • Liquid core capsules and methods of synthesis thereof through interfacial polymerization
    • 液芯胶囊及其通过界面聚合合成的方法
    • US08029709B2
    • 2011-10-04
    • US11263310
    • 2005-10-31
    • Dan WuCharles ScottCarlos CoChia-Chi Ho
    • Dan WuCharles ScottCarlos CoChia-Chi Ho
    • B01J13/02B32B5/00
    • A61K9/5146A61K9/5192B01J13/16Y10T428/2982
    • A process for the encapsulation of liquid particles within nanometer thick polymer shells utilizes an interfacial free radical alternating copolymerization process. Encapsulating a liquid material includes providing a mixture comprising the liquid material to be encapsulated, a hydrophobic monomer in a non-polar solution and a hydrophilic monomer in a polar solution. The liquid material is compatible in either the polar solution or the non-polar solution. The polar solution and the non-polar solution are not miscible in each other. The mixture is homogenized to form an emulsion, and then polymerized by an initiator which initiates an interfacial free radical alternating copolymerization process. The copolymerization process is optimally constrained to proceed only at the hydrophobic and hydrophilic interface thus forming a polymer around the liquid material.
    • 液体颗粒在纳米厚聚合物壳体内的封装方法采用界面自由基交替共聚方法。 包封液体材料包括提供包含待包封的液体材料,非极性溶液中的疏水性单体和极性溶液中的亲水性单体的混合物。 液体材料在极性溶液或非极性溶液中是相容的。 极性溶液和非极性溶液彼此不混溶。 将混合物均化以形成乳液,然后通过引发界面自由基交替共聚方法的引发剂进行聚合。 共聚过程被优化地限制在仅在疏水和亲水界面处进行,从而在液体材料周围形成聚合物。
    • 53. 发明授权
    • Power system for a heart actuation device
    • 用于心脏致动装置的动力系统
    • US07753837B2
    • 2010-07-13
    • US11298423
    • 2005-12-08
    • David Boyd Melvin
    • David Boyd Melvin
    • A61M1/10
    • A61M1/122A61M1/1003A61M1/1008A61M1/1049A61M1/1055A61M1/1068A61M1/1086A61M1/12A61M1/127A61M2205/33A61M2205/3303
    • Actuator mechanisms on the heart are of several types. In preferred embodiments, they are generally simple, durable, mechanical assemblies and are driven by power delivered from a remote location, generally outside the chest, by a variety of mechanisms. The invention teaches physical mechanisms (1) for transfer of cyclic power from outside the chest to the region of the heart for that purpose, either as translational or rotary motion. Also taught are electromechanical converting mechanisms suitable for delivering power to those transfer devices. The embodiments described herein for either transmission of energy from a site of generation to a conduit (2, 10, 22), and of conduits that then deliver energy to heart actuators, have contours and interfaces designed to promote a favorable biologic response similar to the pseudosynovial capsules that surround artificial joints. Further, design features are chosen to avoid both non-vented gas-filled chambers and static collections of tissue fluid.
    • 心脏上的致动器机制有几种类型。 在优选实施例中,它们通常是简单,耐用的机械组件,并且通过各种机构从通常在胸部外部的远程位置递送的动力驱动。 本发明教导了用于为了目的将循环功率从胸部外部转移到心脏区域的物理机制(1),作为平移或旋转运动。 还教导了适于将功率传递给那些传送装置的机电转换机构。 本文描述的用于将能量从发生位点传输到导管(2,10,22)的导管和然后将能量传递给心脏致动器的导管具有设计成促进类似于 围绕人造关节的假性动脉胶囊。 此外,选择设计特征以避免非排气的充气室和组织液的静态收集。
    • 54. 再颁专利
    • High performance biodegradable materials from oriented starch derivatives
    • 来自定向淀粉衍生物的高性能可生物降解材料
    • USRE38773E1
    • 2005-08-09
    • US10137675
    • 2002-05-02
    • James E. MarkBrooke Zhao PetersonBurak EmanIvet BaharAndrzej Kloczkowski
    • James E. MarkBrooke Zhao PetersonBurak EmanIvet BaharAndrzej Kloczkowski
    • B29C49/08B29C55/00B29D7/01C07G99/00D01F9/00D02J1/06D04H1/60D04H1/64C07G17/00
    • D04H1/60B29C55/005B29D7/01B29K2003/00B29K2105/0061D01F9/00
    • The present invention involves the synthesis of a series of amylose (starch) derivatives with various degrees of substitution and amylose/amylopectin ratios. These chains are chemically crosslinked and then mechanically deformed (stretched) to produce a biodegradable and mechanically superior material. Specifically, the process consists of chemically modifying starch into starch derivatives such as starch ethers, starch esters and starch carbamates. The polymers have a percentage degree of substitution of from about 35% to about 95% (degree of substitution is from about 1.05 to about 2.85) and preferably have a percentage degree of substitution of from about 65% to about 90% (degree of substitution is from about 1.95 to about 2.70). The starch derivatives are crosslinked to obtain crosslinked chains and processed into sheets, films, fibers, threads or other articles as known in the art. After processing, the articles are swollen in a thermodynamically acceptable solvent or solvent mixture to a desired volume and deformed in a uniaxial or biaxial extension. The polymers materials are preferably stretched from about 1% to about 500% in the direction of stretching. Finally, the solvent is removed, yielding a homogeneous, highly-ordered material. The present invention improves the properties and the quality of sheets, films, fibers, threads or other articles with respect, for example, to mechanical strength. The materials are developed from starch, a natural renewable source which has low cost, high production levels and which replaces petroleum-based, synthetic polymers; the materials acquire high-strength, high-modulus, toughness and flexibility; and the materials exhibit structural and functional stability during processing, storage and use, yet are susceptible to biodegradation upon disposal.
    • 本发明涉及一系列具有不同取代度和直链淀粉/支链淀粉比例的直链淀粉(淀粉)衍生物的合成。 这些链化学交联,然后机械变形(拉伸)以产生可生物降解和机械上优异的材料。 具体来说,该方法包括将淀粉化学改性成淀粉衍生物如淀粉醚,淀粉酯和淀粉氨基甲酸酯。 聚合物具有约35%至约95%的取代百分比(取代度为约1.05至约2.85),优选具有约65%至约90%的取代百分比(取代度 为约1.95至约2.70)。 将淀粉衍生物交联以获得交联链,并加工成如本领域已知的片,膜,纤维,线或其它制品。 在加工之后,将物品在热力学上可接受的溶剂或溶剂混合物中溶胀至所需体积并在单轴或双轴延伸中变形。 聚合物材料优选在拉伸方向上从约1%至约500%拉伸。 最后,除去溶剂,得到均匀的高度有序的材料。 本发明改进了例如机械强度的片材,薄膜,纤维,线或其他制品的性能和质量。 该材料由淀粉,天然可再生能源开发,成本低,生产水平高,代替石油基合成聚合物; 该材料具有高强度,高模量,韧性和柔韧性; 并且该材料在加工,储存和使用期间表现出结构和功能稳定性,但在处理时易于生物降解。
    • 56. 发明申请
    • Microfabricated structures and processes for manufacturing same
    • US20050067286A1
    • 2005-03-31
    • US10947557
    • 2004-09-22
    • Chong AhnKrishnan TrichurSreeram Appasamy
    • Chong AhnKrishnan TrichurSreeram Appasamy
    • C25D1/10
    • B81C99/009B81B2203/033B81B2203/0361B81B2203/0376C25D1/10
    • Various techniques for the fabrication of highly accurate master molds with precisely defined microstructures for use in plastic replication using injection molding, hot embossing, or casting techniques are disclosed herein. Three different fabrication processes used for master mold fabrication are disclosed wherein one of the processes is a combination of the other two processes. In an embodiment of the first process, a two-step electroplating approach is used wherein one of the metals forms the microstructures and the second metal is used as a sacrificial support layer. Following electroplating, the exact height of the microstructures is defined using a chemical mechanical polishing process. In an embodiment of the second process, a modified electroforming process is used for master mold fabrication. The specific modifications include the use of Nickel-Iron (80:20) as a structural component of the master mold, and the use of a higher saccharin concentration in the electroplating bath to reduce tensile stress during plating and electroforming on the top as well as sides of the dummy substrate to prevent peel off of the electroform. The electroforming process is also well suited towards the fabrication of microstructures with non-rectangular cross sectional profiles. Also disclosed is an embodiment of a simple fabrication process using direct deposition of a curable liquid molding material combined with the electroforming process. Finally, an embodiment of a third fabrication process combines the meritorious features of the first two approaches and is used to fabricate a master mold using a combination of the two-step electroplating plus chemical mechanical polishing approach and the electroforming approach to fabricate highly accurate master molds with precisely defined microstructures. The microstructures are an integral part of the master mold and hence the master mold is more robust and well suited for high volume production of plastic MEMS devices through replication techniques such as injection molding.
    • 59. 发明授权
    • Transintegumental power transformers with high permeability cores
    • 具有高磁导率核心的电力变压器
    • US6032076A
    • 2000-02-29
    • US045432
    • 1998-03-20
    • David MelvinH. Thurman HendersonArthur J. Helmicki
    • David MelvinH. Thurman HendersonArthur J. Helmicki
    • A61F2/02A61N1/08A61N1/378A61N2/04A61N1/00
    • A61N1/08A61F2250/0001A61N1/3787
    • Extra- to intra-corporeal power is provided by a transformer implanted at least partially within a defunctionalized intestinal pouch (or sack), such as an ileal pouch. The transformer includes a continuous loop magnetic core which is implanted within the pouch. The pouch itself includes a passageway permitting the secondary wiring to extend around the and through the magnetic core and through its central opening without entering the pouch providing intracorporeal current. Wire providing the primary windings extend from outside the body in through a stoma into the pouch and surround portions of the magnetic core within the pouch. Because of the use of a generally continuous loop magnetic core of high permeability, there is little or virtually no magnetic flux leakage. A solid circular core of a high permeability material may be used. In an alternate embodiment of the present invention the magnetic core can be divided into two separate portions, one implanted within the pouch and one implanted within the peritoneum adjacent the pouch so that the two core portions combine to form a generally continuous loop magnetic path, separated only by the intestinal wall of the pouch.
    • 通过植入至少部分在功能化的肠袋(或袋)(例如回肠袋)内的变压器来提供额外的体内功率。 变压器包括植入袋内的连续环形磁芯。 袋本身包括通道,允许二次布线围绕并通过磁芯延伸并穿过其中心开口而不进入提供体内电流的袋。 提供初级绕组的线从身体外部通过造口延伸到袋中并且围绕袋内的磁芯的部分。 由于使用高磁导率的通常连续的环形磁芯,因此几乎没有或几乎没有磁通泄漏。 可以使用高磁导率材料的实心圆芯。 在本发明的替代实施例中,磁芯可以分为两个分开的部分,一个植入在囊内,一个植入在邻近袋的腹膜内,使得两个核心部分组合形成大致连续的环路径,分离 只能通过肠壁的肠壁。