利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

35 条记录 (耗时 0.03 秒)

    SEMIPERMEABLE ULTRATHIN POLYMER MEMBRANES
    12.
    发明申请
    SEMIPERMEABLE ULTRATHIN POLYMER MEMBRANES 审中-公开

    公开(公告)号：US20170320057A1

    公开(公告)日：2017-11-09

    申请号：US15585424

    申请日：2017-05-03

    申请人： Ultra Small Fibers, LLC

    发明人： William Hudson Hofmeister ,  Alexander Yuryevich Terekhov ,  Jose Lino Vasconcelos da Costa

    IPC分类号： B01L3/00 ,  G01N33/50 ,  B32B3/26 ,  B32B38/00 ,  B29C37/00 ,  B29C41/02 ,  B29C41/38 ,  B32B27/30 ,  C08J5/18 ,  B05D1/00 ,  B29L31/00 ,  B29K67/00

    摘要： A semipermeable ultrathin polymer membrane is a microfluidic device that comprises a substantially optically transparent polymer film having a surface area to thickness ratio of at least 1,000,000:1, and an array of precisely spatially ordered pores of a user-selected diameter defined therethrough. Such membranes can be fabricated by providing a mold having a patterned array of nanoholes femtosecond laser ablated in a surface thereof; applying a first polymer solution onto the mold surface so that the first polymer solution infiltrates the nanoholes; allowing the first polymer solution to dry and form a replica of the mold having a plurality of freestanding nanoneedles extending from a surface of the replica; removing the replica from the mold; coating the replica surface with a second polymer solution; drying the second polymer solution to form a porous polymer film; and dissolving the replica in a solvent to release the film from the replica as a semipermeable ultrathin polymer membrane. Also disclosed are multi-chambered microfluidic devices for studying cell biology in vitro that incorporate one or more such semipermeable ultrathin polymer membranes.

    Filter media ribbons with nanofibers formed thereon
    14.
    发明授权
    Filter media ribbons with nanofibers formed thereon 有权

    公开(公告)号：US11944926B2

    公开(公告)日：2024-04-02

    申请号：US17688616

    申请日：2022-03-07

    申请人： ULTRA SMALL FIBERS, LLC

    发明人： William H. Hofmeister ,  Robert A. Van Wyk ,  Collin Anderson

    IPC分类号： B01D39/16 ,  D04H3/016

    CPC分类号： B01D39/1623 ,  D04H3/016 ,  B01D2239/0618 ,  B01D2239/1208 ,  B01D2239/1233

    摘要： Nanofiber filter media ribbons are flexible elongate strips of polymeric material having a surface on which is formed an array of nanofibers. Ribbons are formable into woven or non-woven mats. The array of nanofibers can be configured to filter a predetermined contaminant from a fluid stream passing through the mats. Filter ribbons are formable by applying a moldable polymer to a first angular location of a rotating cylindrical roll having an array of nanoholes formed in a circumferential surface thereof so that the polymer covers the surface of the roll and infiltrates the nanoholes; cooling the polymer while rotating the polymer-covered roll to a second angular position; and removing the cooled polymer from the roll as an elongate film having an array of nanofibers formed on a surface thereof by the polymer that infiltrated the nanoholes.

    FILTER MEDIA RIBBONS WITH NANOFIBERS FORMED THEREON
    17.
    发明申请
    FILTER MEDIA RIBBONS WITH NANOFIBERS FORMED THEREON 有权

    公开(公告)号：US20220258084A1

    公开(公告)日：2022-08-18

    申请号：US17688616

    申请日：2022-03-07

    申请人： ULTRA SMALL FIBERS, LLC

    发明人： William H. Hofmeister ,  Robert A. Van Wyk ,  Collin Anderson

    IPC分类号： B01D39/16 ,  D04H3/016

    摘要： Nanofiber filter media ribbons are flexible elongate strips of polymeric material having a surface on which is formed an array of nanofibers. Ribbons are formable into woven or non-woven mats. The array of nanofibers can be configured to filter a predetermined contaminant from a fluid stream passing through the mats. Filter ribbons are formable by applying a moldable polymer to a first angular location of a rotating cylindrical roll having an array of nanoholes formed in a circumferential surface thereof so that the polymer covers the surface of the roll and infiltrates the nanoholes; cooling the polymer while rotating the polymer-covered roll to a second angular position; and removing the cooled polymer from the roll as an elongate film having an array of nanofibers formed on a surface thereof by the polymer that infiltrated the nanoholes.

    TUNABLE NANOFIBER FILTER MEDIA AND FILTER DEVICES
    18.
    发明申请
    TUNABLE NANOFIBER FILTER MEDIA AND FILTER DEVICES 有权

    公开(公告)号：US20210346835A1

    公开(公告)日：2021-11-11

    申请号：US17246985

    申请日：2021-05-03

    申请人： ULTRA SMALL FIBERS, LLC

    发明人： William Hudson Hofmeister ,  Robert A. Van Wyk ,  Keith Allen Holloway

    IPC分类号： B01D46/52 ,  B01D63/08 ,  B01D67/00

    摘要： A tunable nanofiber filter device can include a filter housing defining an interior space, the housing having defined therein and inlet and an outlet, each in fluid communication with the interior space, and a plurality of filter laminas disposed within the interior space, each filter lamina including an upper surface, a lower surface, and an aperture defined therethrough. The plurality of filter laminas can be arranged in a stack wherein the opposing surfaces of adjacent filter laminas define a portion of an interlaminar flow space extending between the opposing surfaces. The flow space can be in fluid communication with the apertures of corresponding adjacent filter laminas to form a continuous flow passage extending through the lamina stack from the inlet to the outlet. An array nanofibers can extend into the flow passage from a portion of each filter lamina such that a fluid flowed through the flow passage flows across a portion of said array.

    Method for modifying the wettability of surfaces
    20.
    发明授权
    Method for modifying the wettability of surfaces 有权

    公开(公告)号：US10695961B2

    公开(公告)日：2020-06-30

    申请号：US16526287

    申请日：2019-07-30

    申请人： Ultra Small Fibers, LLC

    发明人： William Hudson Hofmeister

    IPC分类号： B29C41/26 ,  C08J5/18 ,  B29C41/40 ,  B01D15/10 ,  C02F1/28 ,  B29L7/00 ,  B01D53/26 ,  C02F101/32

    摘要： A method for modifying the wettability of a surface of an object can comprise forming on the surface of the object one or more arrays of nanofibers, wherein the one or more arrays of nanofibers includes nanofibers spaced along an X-axis and a Y-axis at the same or different intervals along either axis, the one or more arrays of nanofibers is integral with the object, and the nanofibers all have a base portion that is substantially normal to the surface. The intervals, diameter, and length of the nanofibers of the one or more arrays of nanofibers are selected so that the wettability of the surface for one or more predetermined liquids is increased or decreased relative to the wettability of the surface in the absence of the array of nanofibers.