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    • 44. 发明授权
    • Highly convertible endolumenal prostheses and methods of manufacture
    • 高度可转换的腔内假体和制造方法
    • US07377939B2
    • 2008-05-27
    • US10988814
    • 2004-11-15
    • Michael S. WilliamsRobert S. LangerYadong Wang
    • Michael S. WilliamsRobert S. LangerYadong Wang
    • A61F2/06
    • A61F2/06A61L31/04A61L31/041A61L31/14A61L2400/16
    • Endolumenal prostheses that readily and extensively convert from a delivery configuration to a deployed configuration are disclosed. Endolumenal prostheses may be fabricated from one or more shape memory polymers, a high modulus elastomer, a polymer that is both elastomeric and exhibits shape memory behavior, a hydrogel, or some combination thereof. Polymers used to fabricate the prostheses are selectively synthesized to exhibit desired characteristics such as crystallinity, strain fixity rate, strain recovery rate, elasticity, tensile strength, mechanical strength, cross-linking density, extent physical cross-linking, extent of covalent cross-linking, extent of interpenetrating networks, rate of erosion, heat of fusion, crystallization temperature, and acidity during erosion. The endolumenal prostheses convert to the deployed configuration following delivery to a treatment site, upon exposure to an initiator either present within the body naturally or introduced into the body.
    • 公开了容易且广泛地从输送配置转换成展开构型的腔内假体。 腔内假体可以由一种或多种形状记忆聚合物,高模量弹性体,弹性体和表现出形状记忆行为的聚合物,水凝胶或其某些组合制成。 用于制造假体的聚合物被选择性地合成以显示所需的特性,例如结晶度,应变固定率,应变恢复速率,弹性,拉伸强度,机械强度,交联密度,物理交联程度,共价交联程度 互穿网络的程度,侵蚀速率,熔化热,结晶温度和侵蚀过程中的酸度。 在暴露于身体内自然存在或引入体内的引发剂之后,腔内假体转化为部署构型。
    • 45. 发明授权
    • Microscale lyophilization and drying methods for the stabilization of molecules
    • 用于稳定分子的微型冷冻干燥方法
    • US07354597B2
    • 2008-04-08
    • US10308579
    • 2002-12-03
    • Audrey M. JohnsonMichael J. CimaRobert S. Langer
    • Audrey M. JohnsonMichael J. CimaRobert S. Langer
    • A61F2/02A61K9/14
    • F26B5/06
    • Methods and systems are provided for microscale lyophilization or microscale drying of agents of interest, such as pharmaceutical agents or other molecules that are unstable or easily degraded in solution. The drying method includes (a) providing a liquid comprising an agent of interest dissolved or dispersed in a volatile liquid medium; (b) depositing a microquantity (between 1 nL and 10 μL) of the liquid onto a preselected site of a substrate; and then (c) drying the microquantity by volatilizing the volatile liquid medium to produce a dry, solid form of the agent of interest. The lyophilization method includes freezing the microquantity of liquid after step (b) and before step (c). By processing the agent of interest in microquantities in controlled contact with a substrate surface, improved heat and mass transfer is provided, yielding better process control over drying of the agent of interest compared to conventional bulk drying or lyophilization.
    • 提供的方法和系统用于微量冻干或微量干燥感兴趣的试剂,例如不稳定或容易在溶液中降解的药剂或其它分子。 干燥方法包括(a)提供包含溶解或分散在挥发性液体介质中的感兴趣剂的液体; (b)将液体的微量(在1nL和10μL之间)沉积到衬底的预选位置; 然后(c)通过挥发挥发性液体介质来干燥微量,以产生干燥,固体形式的感兴趣的试剂。 冻干方法包括在步骤(b)之后和步骤(c)之前冷冻液体的微量。 通过加工与基材表面受控接触的微量级的感兴趣的试剂,提供了改进的热和质量传递,与传统的大体积干燥或冻干相比,可以对感兴趣的试剂的干燥产生更好的工艺控制。
    • 49. 发明授权
    • Aerodynamically light particles for pulmonary drug delivery
    • 用于肺部药物递送的空气动力学轻微颗粒
    • US06977087B2
    • 2005-12-20
    • US10090418
    • 2002-03-01
    • David A. EdwardsGiovannia CaponettiJeffrey S. HrkachNoah LotanJustin HanesAbdell Aziz Ben-JebriaRobert S. Langer
    • David A. EdwardsGiovannia CaponettiJeffrey S. HrkachNoah LotanJustin HanesAbdell Aziz Ben-JebriaRobert S. Langer
    • A61K9/00A61K9/14A61K9/16A61K31/56A61K31/568A61K38/28
    • A61K9/0075A61K9/1647A61K31/56A61K31/568A61K38/28
    • Improved aerodynamically light particles for delivery to the pulmonary system, and methods for their preparation and administration are provided. In a preferred embodiment, the aerodynamically light particles are made of a biodegradable material and have a tap density less than 0.4 g/cm3 and a mass mean diameter between 5 μm and 30 μm. The particles may be formed of biodegradable materials such as biodegradable polymers. For example, the particles may be formed of a functionalized polyester graft copolymer consisting of a linear α-hydroxy-acid polyester backbone having at least one amino acid group incorporated herein and at least on poly(amino acid) side chain extending from an amino acid group in the polyester backbone. In one embodiment, aerodynamically light particles having a large mean diameter, for example greater than 5 μm, can be used for enhanced delivery of a therapeutic or diagnostic agent to the alveolar region of the lung. The aerodynamically light particles optionally can incorporate a therapeutic or diagnostic agent, and may be effectively aerosolized for administration to the respiratory tract to permit systemic or local delivery of a wide variety of incorporated agents.
    • 提供用于递送至肺系统的改善的空气动力学轻微颗粒,以及其制备和给药方法。 在优选的实施方案中,空气动力学轻微颗粒由可生物降解的材料制成,并且振实密度小于0.4g / cm 3,质量平均直径在5μm和30μm之间。 颗粒可以由可生物降解的材料如可生物降解的聚合物形成。 例如,颗粒可以由官能化的聚酯接枝共聚物形成,所述官能化聚酯接枝共聚物由具有至少一个引入本文的氨基酸基团和至少在从氨基酸延伸的聚(氨基酸)侧链上的直链α-羟基酸聚酯主链组成 集团在聚酯骨干。 在一个实施方案中,具有大平均直径(例如大于5μm)的空气动力学轻的颗粒可用于增强治疗或诊断剂递送至肺的肺泡区域。 空气动力学轻微颗粒任选地可以掺入治疗剂或诊断剂,并且可以有效地雾化用于给予呼吸道以允许各种并入药剂的全身或局部递送。
    • 50. 发明授权
    • Shape memory polymers
    • 形状记忆聚合物
    • US06720402B2
    • 2004-04-13
    • US10141891
    • 2002-05-08
    • Robert S. LangerAndreas Lendlein
    • Robert S. LangerAndreas Lendlein
    • C08G1848
    • G01K5/483A61B2017/00871B29C61/003C08L101/00Y10S525/903Y10S977/754
    • Shape memory polymer compositions, articles of manufacture thereof, and methods of preparation and use thereof are described. The shape memory polymer compositions can hold more than one shape in memory. Suitable compositions include at least one hard segment and at least one soft segment. At least one of the hard or soft segments can contain a crosslinkable group, and the segments can be linked by formation of an interpenetrating network or a semi-interpenetrating network, or by physical interactions of the blocks. Objects can be formed into a given shape at a temperature above the Ttrans of the hard segment, and cooled to a temperature below to Ttrans of the soft segment. If the object is subsequently formed into a second shape, the object can return to its original shape by heating the object above the Ttrans of the soft segment and below the Ttrans of the hard segment.
    • 描述形状记忆聚合物组合物,其制备方法及其制备和使用方法。 形状记忆聚合物组合物可以在存储器中保持多于一种形状。 合适的组合物包括至少一个硬链段和至少一个软链段。 硬链段或软链段中的至少一个可以包含可交联基团,并且链段可以通过形成互穿网络或半互穿网络或通过块的物理相互作用而链接。 物体可以在高于硬链段的Ttrans的温度下形成给定的形状,并且被冷却到低于软链段的Ttrans的温度。 如果对象随后形成第二形状,则可以通过将软部分的Ttrans上方的物体加热到硬片段的Ttrans下面,物体可以返回到其原始形状。