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Resorbable thin membranes

  • US 7,947,300 B2
  • Filed: 01/16/2007
  • Issued: 05/24/2011
  • Est. Priority Date: 03/10/2000
  • Status: Expired due to Fees
First Claim
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1. A resorbable thin membrane, comprising:

  • an amorphous polymer comprising a resorbability greater than 6 months to 24 months and a viscosity property greater than about 1 g/dL to 3.5 g/dL;

    a first smooth surface, a second smooth surface, and a thickness extending between the first smooth surface and the second smooth surface;

    a glass transition temperature;

    a pre-stretch configuration corresponding to a prior state of the membrane in which the thickness was equal to a first thickness;

    a post-stretch configuration corresponding to a current state of the membrane in which the thickness is equal to a second thickness which is at least 5 times less than the first thickness, the post-stretch configuration corresponding to the membrane having been previously stretched at the glass transition temperature from the first thickness down to the second thickness;

    a propensity, as a consequence of the post-stretch configuration, of the membrane, when brought at a future time to the glass transition temperature, to return to the pre-stretch configuration during which action the thickness increases 5 times above that of the post-stretch configuration from the second thickness to the first thickness; and

    the membrane further possessing a characteristic of losing the propensity following the bringing of the membrane at the future time to the glass transition temperature while the membrane is in the post-stretch configuration.

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