Oriented biopolymeric membrane for meningeal tissue repair

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Web – sheet or filament bases; compositions of bandages; or...

Reexamination Certificate

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C424S445000, C424S447000, C424S449000, C424S402000

Reexamination Certificate

active

07374777

ABSTRACT:
A cell occlusion sheet membrane adapted for repairing a damaged meningeal tissue. The sheet membrane contains a layer of cross-linked, oriented biopolymeric fibers that has a thickness of 0.1 mm to 3.0 mm, a density of 0.1 g/cm3to 1.2 g/cm3, a hydrothermal shrinkage temperature of 45° C. to 80° C., a suture pullout strength of 0.1 kg to 5 kg, a tensile strength of 10 kg/cm2to 150 kg/cm2, and permeability to molecules having molecular weights of 200 to 300,000 daltons. Also disclosed is a method for making the membrane.

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