×

Biological fluid filters having flexible walls and methods for making such filters

  • US 9,782,707 B2
  • Filed: 03/24/2014
  • Issued: 10/10/2017
  • Est. Priority Date: 03/24/2014
  • Status: Active Grant
First Claim
Patent Images

1. A filter assembly for removing leukocytes from blood comprising:

  • a) a housing having first and second flexible housing walls wherein one of said walls comprises an inlet housing wall associated with an inlet port and said other of said housing walls comprises an outlet housing wall associated with an outlet port;

    b) a filter medium disposed between said flexible walls, said medium comprising, in the direction of flow, at least first, second and third filter elements wherein(i) said first element comprises a material suitable for removing a component or particulate of a biological fluid and is disposed between said housing wall including said inlet port and said second element;

    (ii) said second element comprises a material suitable for removing another component of said biological fluid and is disposed between said first element and said third element;

    (iii) said third element comprises a single sheet of an organic or inorganic material disposed between said housing wall associated with said outlet port and said second filter element, said sheet comprising central, porous, mesh portion and an outer peripheral, non-porous, frame portion integral with and comprising the same material as said at least said central mesh portion, said sheet having a thickness of-greater than 0.25 cm; and

    c) said assembly further comprising an outer peripheral seal and at least one inner peripheral seal spaced from said outer peripheral seal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×